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2004 National Survey on Drug Use & Health:  Detailed Tables

50428

Table 4.1C Standard Errors of Numbers (in Thousands) of Persons Who Initiated Marijuana Use in the United States, Their Mean Age at First Use, and Rates of First Use (Per 1,000 Person-Years of Exposure): 1965-2003, Based on 2002-2004 NSDUHs
YEAR NUMBER OF INITIATES (1,000s) MEAN AGE AGE-SPECIFIC RATES1
All Ages Under 18 18 or Older 12-17 18-25
1965 78 51 61 0.4 2.5 3.1
1966 77 47 60 0.4 2.2 2.9
1967 92 56 74 0.3 2.7 3.5
1968 122 82 87 0.2 3.9 3.9
1969 122 68 101 0.2 3.2 4.8
1970 127 79 100 0.2 3.7 4.4
1971 119 67 101 0.2 3.1 5.0
1972 117 75 89 0.2 3.5 4.3
1973 124 76 96 0.2 3.5 5.0
1974 113 80 80 0.3 3.9 3.8
1975 116 82 81 0.2 4.1 4.0
1976 116 83 79 0.3 4.2 4.1
1977 116 84 80 0.3 4.2 3.7
1978 115 89 76 0.3 4.7 3.9
1979 105 78 73 0.3 4.3 3.5
1980 94 72 63 0.3 3.9 3.5
1981 90 66 65 0.3 3.8 3.8
1982 89 69 60 0.4 3.9 3.3
1983 93 68 62 0.4 3.7 3.7
1984 82 63 55 0.3 3.6 3.3
1985 91 70 56 0.3 4.1 3.1
1986 82 62 56 0.3 3.6 3.4
1987 75 58 49 0.4 3.4 3.3
1988 75 59 43 0.5 3.5 2.8
1989 69 49 49 0.3 2.9 3.2
1990 63 45 45 0.5 2.7 2.6
1991 67 48 48 0.5 2.8 2.8
1992 73 51 49 0.2 2.9 3.2
1993 68 45 50 0.3 2.5 3.0
1994 70 45 52 0.3 2.4 3.3
1995 68 37 56 0.2 1.9 3.4
1996 62 37 48 0.2 1.9 2.9
1997 63 39 46 0.2 2.0 2.7
1998 54 37 39 0.2 1.8 2.4
1999 54 36 39 0.2 1.8 2.3
2000 57 39 37 0.2 1.9 2.1
2001 53 34 39 0.2 1.7 2.0
20022 57 42 38 0.2 2.1 2.2
20033 79 58 55 0.2 2.8 3.1
*Low precision; no estimate reported.
-- Not available.
NOTE: Comparisons between years, particularly between recent estimates and those from 10 or more years prior, should be made with caution due to potential bias from reporting and other sources.
1 The numerator of each rate is the number of persons in the age group who initiated use of the drug in the specified year, while the denominator is the person-time exposure of persons in the age group measured in thousands of years.
2 Estimated using 2003 and 2004 data only.
3 Estimated using 2004 data only.
Source: SAMHSA, Office of Applied Studies, National Survey on Drug Use and Health, 2002, 2003, and 2004.

50428

Table 4.2C Standard Errors of Numbers (in Thousands) of Persons Who Initiated Cocaine Use in the United States, Their Mean Age at First Use, and Rates of First Use (Per 1,000 Person-Years of Exposure): 1965-2003, Based on 2002-2004 NSDUHs
YEAR NUMBER OF INITIATES (1,000s) MEAN AGE AGE-SPECIFIC RATES1
All Ages Under 18 18 or Older 12-17 18-25
1965 26 * 23 2.0 * 0.9
1966 15 * 14 1.6 * *
1967 32 * 31 2.0 * 1.2
1968 38 22 32 1.3 1.0 1.2
1969 29 13 26 1.3 0.5 0.9
1970 37 18 32 0.5 0.8 1.3
1971 50 21 46 0.6 0.9 1.6
1972 60 25 54 0.4 1.1 2.0
1973 59 26 53 0.5 1.1 1.8
1974 70 26 65 0.5 1.1 1.8
1975 62 24 56 0.4 1.0 1.7
1976 68 26 63 0.3 1.1 2.1
1977 77 30 70 0.4 1.3 2.0
1978 72 29 66 0.3 1.3 2.0
1979 74 30 67 0.2 1.4 2.3
1980 77 35 69 0.4 1.6 1.9
1981 77 34 68 0.3 1.6 2.3
1982 79 32 71 0.5 1.5 2.0
1983 81 30 77 0.3 1.5 2.6
1984 74 33 68 0.3 1.6 2.1
1985 70 29 64 0.4 1.5 2.0
1986 66 28 62 0.4 1.5 1.9
1987 62 26 58 0.4 1.4 2.0
1988 63 24 57 0.4 1.3 2.0
1989 57 18 55 0.4 1.0 1.9
1990 54 22 50 0.5 1.2 1.5
1991 44 19 40 0.5 1.0 1.3
1992 53 23 47 0.7 1.2 1.3
1993 41 15 38 0.6 0.8 1.2
1994 45 14 42 0.5 0.7 1.5
1995 43 14 41 0.5 0.7 1.5
1996 44 14 43 0.6 0.7 1.4
1997 41 14 38 0.3 0.6 1.4
1998 39 14 36 0.4 0.6 1.2
1999 36 14 34 0.4 0.6 1.0
2000 38 16 35 0.4 0.7 1.1
2001 43 16 39 0.4 0.7 1.0
20022 42 19 37 0.3 0.8 1.0
20033 63 29 55 0.4 1.1 1.8
*Low precision; no estimate reported.
-- Not available.
NOTE: Comparisons between years, particularly between recent estimates and those from 10 or more years prior, should be made with caution due to potential bias from reporting and other sources.
1 The numerator of each rate is the number of persons in the age group who initiated use of the drug in the specified year, while the denominator is the person-time exposure of persons in the age group measured in thousands of years.
2 Estimated using 2003 and 2004 data only.
3 Estimated using 2004 data only.
Source: SAMHSA, Office of Applied Studies, National Survey on Drug Use and Health, 2002, 2003, and 2004.

50428

Table 4.3C Standard Errors of Numbers (in Thousands) of Persons Who Initiated Crack Use in the United States, Their Mean Age at First Use, and Rates of First Use (Per 1,000 Person-Years of Exposure): 1965-2003, Based on 2002-2004 NSDUHs
YEAR NUMBER OF INITIATES (1,000s) MEAN AGE AGE-SPECIFIC RATES1
All Ages Under 18 18 or Older 12-17 18-25
1965 * * * * * *
1966 * * * * * *
1967 * * * * * *
1968 * * * * * *
1969 7 * * * * *
1970 * * * * * *
1971 * * * * * *
1972 9 * * * * *
1973 17 * * * * *
1974 7 * * * * *
1975 13 * 12 2.1 * 0.2
1976 12 * 12 * * *
1977 15 * 13 1.0 * 0.4
1978 23 * 19 1.1 * 0.5
1979 17 * 16 1.2 * 0.4
1980 23 13 19 1.3 0.6 0.4
1981 23 7 22 0.9 0.3 0.6
1982 26 8 24 1.1 0.4 0.4
1983 29 6 28 1.1 0.3 0.6
1984 35 10 34 0.8 0.5 0.7
1985 41 12 41 1.0 0.6 0.8
1986 30 10 28 1.0 0.5 0.7
1987 35 11 31 0.8 0.6 0.8
1988 41 11 38 0.7 0.6 0.7
1989 35 4 35 0.5 0.2 1.0
1990 43 10 41 0.8 0.5 0.7
1991 36 10 34 0.6 0.5 0.8
1992 36 8 35 0.9 0.4 0.8
1993 34 9 32 1.0 0.4 0.7
1994 33 8 32 0.8 0.4 0.8
1995 33 7 33 1.1 0.3 0.7
1996 35 7 34 0.8 0.3 0.8
1997 31 7 30 0.9 0.3 0.7
1998 27 8 25 0.5 0.4 0.7
1999 31 7 30 0.8 0.3 0.6
2000 31 8 30 0.9 0.3 0.5
2001 23 7 21 1.0 0.3 0.4
20022 30 9 28 0.7 0.4 0.5
20033 37 12 34 1.1 0.5 0.6
*Low precision; no estimate reported.
-- Not available.
NOTE: Comparisons between years, particularly between recent estimates and those from 10 or more years prior, should be made with caution due to potential bias from reporting and other sources.
1 The numerator of each rate is the number of persons in the age group who initiated use of the drug in the specified year, while the denominator is the person-time exposure of persons in the age group measured in thousands of years.
2 Estimated using 2003 and 2004 data only.
3 Estimated using 2004 data only.
Source: SAMHSA, Office of Applied Studies, National Survey on Drug Use and Health, 2002, 2003, and 2004.

50428

Table 4.4C Standard Errors of Numbers (in Thousands) of Persons Who Initiated Heroin Use in the United States, Their Mean Age at First Use, and Rates of First Use (Per 1,000 Person-Years of Exposure): 1965-2003, Based on 2002-2004 NSDUHs
YEAR NUMBER OF INITIATES (1,000s) MEAN AGE AGE-SPECIFIC RATES1
All Ages Under 18 18 or Older 12-17 18-25
1965 * * * * * *
1966 * * * * * *
1967 15 * 8 * * 0.4
1968 26 23 12 0.6 1.1 0.5
1969 11 * 11 0.8 * 0.4
1970 28 13 25 2.5 0.6 0.6
1971 23 8 22 0.7 0.3 0.8
1972 31 5 30 0.6 0.2 1.1
1973 28 9 29 0.9 0.4 0.9
1974 31 16 27 0.7 0.6 0.9
1975 15 8 13 1.0 0.3 0.4
1976 18 * 17 1.0 * 0.5
1977 19 4 19 0.9 0.2 0.5
1978 16 8 14 0.9 0.4 0.4
1979 17 8 15 1.0 0.3 0.4
1980 17 * 15 0.9 * 0.5
1981 19 5 18 0.7 0.3 0.5
1982 13 * 13 0.7 * 0.4
1983 18 * 18 1.3 * 0.4
1984 18 8 16 1.0 0.4 0.4
1985 9 * 9 0.9 * 0.2
1986 16 * 13 1.2 * 0.3
1987 16 4 15 1.4 0.2 0.4
1988 20 * 18 1.0 * 0.5
1989 16 * 16 1.0 * 0.4
1990 13 * 12 1.3 * 0.3
1991 18 * 18 1.2 * 0.4
1992 19 4 18 1.1 0.2 0.3
1993 13 3 12 1.1 0.1 0.3
1994 15 4 14 1.3 0.2 0.3
1995 18 5 17 1.0 0.2 0.3
1996 18 4 18 0.9 0.2 0.5
1997 14 5 13 1.4 0.2 0.3
1998 16 5 16 0.7 0.2 0.4
1999 14 4 13 1.3 0.2 0.3
2000 10 5 9 0.7 0.2 0.2
2001 14 6 14 1.0 0.2 0.4
20022 17 5 16 0.9 0.2 0.3
20033 16 10 13 1.4 0.4 0.4
*Low precision; no estimate reported.
-- Not available.
NOTE: Comparisons between years, particularly between recent estimates and those from 10 or more years prior, should be made with caution due to potential bias from reporting and other sources.
1 The numerator of each rate is the number of persons in the age group who initiated use of the drug in the specified year, while the denominator is the person-time exposure of persons in the age group measured in thousands of years.
2 Estimated using 2003 and 2004 data only.
3 Estimated using 2004 data only.
Source: SAMHSA, Office of Applied Studies, National Survey on Drug Use and Health, 2002, 2003, and 2004.

50428

Table 4.5C Standard Errors of Numbers (in Thousands) of Persons Who Initiated Hallucinogen Use in the United States, Their Mean Age at First Use, and Rates of First Use (Per 1,000 Person-Years of Exposure): 1965-2003, Based on 2002-2004 NSDUHs
YEAR NUMBER OF INITIATES (1,000s) MEAN AGE AGE-SPECIFIC RATES1
All Ages Under 18 18 or Older 12-17 18-25
1965 32 20 26 1.1 1.0 1.3
1966 30 17 24 2.0 0.8 1.0
1967 39 26 29 0.7 1.2 1.2
1968 58 40 43 0.9 1.7 1.6
1969 68 37 57 0.3 1.7 2.4
1970 71 41 59 0.2 1.8 2.4
1971 71 47 55 0.3 2.0 2.2
1972 71 44 54 0.2 1.9 2.1
1973 64 38 48 0.2 1.6 1.9
1974 62 38 47 0.3 1.6 1.6
1975 66 42 49 0.2 1.8 1.9
1976 59 36 46 0.4 1.6 1.6
1977 57 38 44 0.4 1.7 1.6
1978 57 37 42 0.2 1.7 1.6
1979 61 40 43 0.3 1.8 1.4
1980 66 42 50 0.4 2.0 1.6
1981 61 37 47 0.3 1.8 1.6
1982 64 35 51 0.6 1.7 1.5
1983 49 31 39 0.3 1.5 1.4
1984 50 28 41 0.4 1.4 1.4
1985 54 32 39 0.2 1.6 1.5
1986 56 31 44 0.3 1.6 1.6
1987 48 31 34 0.4 1.6 1.3
1988 51 29 40 0.3 1.6 1.4
1989 47 25 39 0.3 1.4 1.5
1990 45 29 35 0.4 1.5 1.2
1991 44 27 35 0.3 1.4 1.3
1992 47 31 36 0.3 1.6 1.3
1993 44 25 35 0.3 1.3 1.4
1994 47 24 39 0.2 1.2 1.6
1995 42 20 36 0.2 1.0 1.4
1996 45 20 39 0.5 0.9 1.5
1997 40 19 35 0.3 0.9 1.4
1998 42 21 35 0.2 0.9 1.2
1999 43 21 35 0.2 0.9 1.3
2000 45 23 37 0.2 1.0 1.3
2001 42 21 37 0.2 0.9 1.2
20022 40 22 33 0.2 0.9 1.1
20033 56 32 46 0.5 1.3 1.3
*Low precision; no estimate reported.
-- Not available.
NOTE: Comparisons between years, particularly between recent estimates and those from 10 or more years prior, should be made with caution due to potential bias from reporting and other sources.
1 The numerator of each rate is the number of persons in the age group who initiated use of the drug in the specified year, while the denominator is the person-time exposure of persons in the age group measured in thousands of years.
2 Estimated using 2003 and 2004 data only.
3 Estimated using 2004 data only.
Source: SAMHSA, Office of Applied Studies, National Survey on Drug Use and Health, 2002, 2003, and 2004.

50428

Table 4.6C Standard Errors of Numbers (in Thousands) of Persons Who Initiated LSD Use in the United States, Their Mean Age at First Use, and Rates of First Use (Per 1,000 Person-Years of Exposure): 1965-2003, Based on 2002-2004 NSDUHs
YEAR NUMBER OF INITIATES (1,000s) MEAN AGE AGE-SPECIFIC RATES1
All Ages Under 18 18 or Older 12-17 18-25
1965 21 * 16 4.4 * 0.4
1966 29 16 24 2.5 0.7 0.9
1967 27 17 21 1.0 0.8 0.8
1968 53 42 31 0.7 1.9 1.1
1969 65 33 58 0.4 1.5 2.3
1970 68 37 56 0.2 1.6 2.3
1971 61 37 50 0.4 1.6 1.9
1972 72 45 53 0.2 1.9 2.0
1973 60 36 48 0.3 1.5 1.8
1974 55 35 40 0.3 1.5 1.5
1975 52 33 38 0.3 1.4 1.3
1976 50 33 40 0.3 1.4 1.4
1977 52 34 39 0.4 1.5 1.4
1978 45 28 33 0.2 1.2 1.2
1979 51 36 38 0.3 1.6 1.2
1980 59 36 47 0.4 1.7 1.4
1981 52 32 42 0.4 1.6 1.3
1982 49 31 37 0.5 1.5 1.1
1983 43 28 35 0.3 1.3 1.2
1984 42 23 36 0.6 1.1 1.2
1985 45 29 33 0.5 1.4 1.0
1986 40 25 32 0.3 1.3 1.1
1987 43 29 29 0.3 1.5 1.0
1988 44 28 34 0.3 1.5 1.2
1989 43 23 35 0.5 1.3 1.2
1990 40 27 28 0.4 1.4 1.0
1991 38 26 28 0.3 1.4 1.1
1992 42 29 33 0.2 1.5 1.3
1993 37 23 29 0.2 1.2 1.1
1994 41 25 32 0.2 1.2 1.2
1995 37 21 31 0.1 1.0 1.3
1996 38 19 33 0.2 0.9 1.3
1997 33 15 29 0.2 0.7 1.2
1998 30 19 22 0.2 0.8 0.9
1999 26 17 21 0.2 0.7 0.7
2000 30 17 24 0.2 0.7 0.9
2001 25 15 20 0.2 0.6 0.7
20022 17 12 12 0.2 0.5 0.5
20033 30 17 24 0.6 0.7 0.7
*Low precision; no estimate reported.
-- Not available.
NOTE: Comparisons between years, particularly between recent estimates and those from 10 or more years prior, should be made with caution due to potential bias from reporting and other sources.
1 The numerator of each rate is the number of persons in the age group who initiated use of the drug in the specified year, while the denominator is the person-time exposure of persons in the age group measured in thousands of years.
2 Estimated using 2003 and 2004 data only.
3 Estimated using 2004 data only.
Source: SAMHSA, Office of Applied Studies, National Survey on Drug Use and Health, 2002, 2003, and 2004.

50428

Table 4.7C Standard Errors of Numbers (in Thousands) of Persons Who Initiated PCP Use in the United States, Their Mean Age at First Use, and Rates of First Use (Per 1,000 Person-Years of Exposure): 1965-2003, Based on 2002-2004 NSDUHs
YEAR NUMBER OF INITIATES (1,000s) MEAN AGE AGE-SPECIFIC RATES1
All Ages Under 18 18 or Older 12-17 18-25
1965 * * * * * *
1966 * * * * * *
1967 * * * * * *
1968 31 30 * 0.6 1.4 *
1969 16 12 * 1.5 0.5 *
1970 30 17 25 0.6 0.7 0.9
1971 38 22 31 0.9 0.9 1.0
1972 47 27 38 0.8 1.1 1.2
1973 43 20 37 0.4 0.8 1.3
1974 43 29 31 0.4 1.2 1.0
1975 38 26 29 0.4 1.1 0.9
1976 42 27 32 0.7 1.1 1.0
1977 39 27 29 0.4 1.1 0.9
1978 40 22 33 0.7 0.9 0.8
1979 35 21 27 0.4 1.0 0.8
1980 33 20 26 0.7 0.9 0.7
1981 30 18 25 0.6 0.8 0.7
1982 31 14 28 0.8 0.6 0.7
1983 24 15 19 0.4 0.7 0.6
1984 20 9 18 0.5 0.4 0.6
1985 19 12 14 0.6 0.6 0.5
1986 22 9 19 0.7 0.5 0.6
1987 20 12 16 1.0 0.6 0.4
1988 17 10 15 1.4 0.5 0.4
1989 17 11 13 0.7 0.6 0.4
1990 13 9 10 1.8 0.5 0.3
1991 15 10 12 1.4 0.5 0.3
1992 18 6 17 0.6 0.3 0.6
1993 16 10 12 0.9 0.5 0.4
1994 13 10 8 0.3 0.5 0.3
1995 19 9 16 0.5 0.4 0.6
1996 14 6 12 0.7 0.3 0.4
1997 12 6 10 0.4 0.3 0.4
1998 10 7 7 0.4 0.3 0.2
1999 15 8 12 0.4 0.3 0.4
2000 14 8 11 0.6 0.3 0.3
2001 12 8 10 0.4 0.3 0.3
20022 12 9 8 0.3 0.3 0.3
20033 19 12 15 1.0 0.5 0.3
*Low precision; no estimate reported.
-- Not available.
NOTE: Comparisons between years, particularly between recent estimates and those from 10 or more years prior, should be made with caution due to potential bias from reporting and other sources.
1 The numerator of each rate is the number of persons in the age group who initiated use of the drug in the specified year, while the denominator is the person-time exposure of persons in the age group measured in thousands of years.
2 Estimated using 2003 and 2004 data only.
3 Estimated using 2004 data only.
Source: SAMHSA, Office of Applied Studies, National Survey on Drug Use and Health, 2002, 2003, and 2004.

50428

Table 4.8C Standard Errors of Numbers (in Thousands) of Persons Who Initiated Ecstasy Use in the United States, Their Mean Age at First Use, and Rates of First Use (Per 1,000 Person-Years of Exposure): 1965-2003, Based on 2002-2004 NSDUHs
YEAR NUMBER OF INITIATES (1,000s) MEAN AGE AGE-SPECIFIC RATES1
All Ages Under 18 18 or Older 12-17 18-25
1965 * * * * * *
1966 * * * * * *
1967 * * * * * *
1968 * * * * * *
1969 * * * * * *
1970 * * * * * *
1971 * * * * * *
1972 9 * * * * *
1973 7 * * * * *
1974 * * * * * *
1975 * * * * * *
1976 15 * 15 1.5 * *
1977 * * * * * *
1978 6 * 4 * * *
1979 12 * 11 1.4 * 0.3
1980 11 * 10 1.9 * 0.2
1981 14 * 14 1.3 * 0.3
1982 9 6 7 1.0 0.3 0.2
1983 21 * 20 2.2 * 0.4
1984 21 * 21 1.5 * 0.5
1985 21 6 20 0.6 0.3 0.5
1986 25 9 23 1.0 0.4 0.6
1987 23 6 22 1.1 0.3 0.6
1988 29 12 25 1.1 0.6 0.7
1989 30 10 28 0.8 0.5 0.9
1990 28 7 27 1.2 0.4 0.6
1991 22 7 21 0.7 0.3 0.7
1992 30 7 30 1.1 0.3 0.7
1993 26 8 24 0.7 0.4 0.8
1994 28 11 25 0.7 0.5 0.8
1995 32 9 30 0.7 0.4 1.0
1996 35 9 33 1.3 0.4 0.9
1997 40 9 38 0.5 0.4 1.2
1998 46 11 45 0.3 0.5 1.3
1999 48 16 44 0.2 0.7 1.3
2000 50 19 46 0.3 0.8 1.2
2001 53 18 49 0.3 0.8 1.2
20022 49 18 44 0.5 0.7 1.1
20033 55 23 49 0.7 0.9 1.2
*Low precision; no estimate reported.
-- Not available.
NOTE: Comparisons between years, particularly between recent estimates and those from 10 or more years prior, should be made with caution due to potential bias from reporting and other sources.
1 The numerator of each rate is the number of persons in the age group who initiated use of the drug in the specified year, while the denominator is the person-time exposure of persons in the age group measured in thousands of years.
2 Estimated using 2003 and 2004 data only.
3 Estimated using 2004 data only.
Source: SAMHSA, Office of Applied Studies, National Survey on Drug Use and Health, 2002, 2003, and 2004.

50428

Table 4.9C Standard Errors of Numbers (in Thousands) of Persons Who Initiated Inhalant Use in the United States, Their Mean Age at First Use, and Rates of First Use (Per 1,000 Person-Years of Exposure): 1965-2003, Based on 2002-2004 NSDUHs
YEAR NUMBER OF INITIATES (1,000s) MEAN AGE AGE-SPECIFIC RATES1
All Ages Under 18 18 or Older 12-17 18-25
1965 23 23 * 0.5 1.1 *
1966 34 31 14 0.6 1.4 0.6
1967 43 37 22 1.0 1.7 0.9
1968 37 28 24 1.2 1.2 0.7
1969 41 33 23 0.5 1.5 1.0
1970 40 27 30 0.5 1.1 1.2
1971 37 26 26 0.9 1.1 0.8
1972 39 30 24 0.8 1.3 0.7
1973 43 26 33 0.8 1.1 1.0
1974 44 24 36 0.7 1.0 1.1
1975 48 33 32 0.4 1.3 1.1
1976 49 34 36 0.4 1.5 1.1
1977 57 34 45 0.4 1.5 1.4
1978 48 35 33 0.4 1.5 1.0
1979 55 37 41 0.5 1.7 1.2
1980 50 37 32 0.6 1.7 0.9
1981 43 32 30 0.4 1.6 0.9
1982 45 31 33 0.5 1.4 0.9
1983 45 33 30 0.5 1.6 0.9
1984 44 30 32 0.5 1.5 1.0
1985 44 29 32 0.5 1.4 1.0
1986 42 30 29 0.6 1.5 0.8
1987 43 29 30 0.5 1.5 0.9
1988 40 30 26 0.3 1.5 0.9
1989 36 23 26 0.7 1.2 1.1
1990 41 26 29 0.3 1.4 1.1
1991 36 25 25 0.6 1.3 0.7
1992 39 28 25 0.2 1.5 1.0
1993 39 23 30 0.4 1.2 1.0
1994 28 20 20 0.3 1.0 0.8
1995 33 18 27 0.5 0.9 1.0
1996 28 16 24 0.3 0.7 0.9
1997 29 18 21 0.2 0.8 0.8
1998 30 20 23 0.4 0.8 0.8
1999 32 20 24 0.3 0.8 0.7
2000 34 23 22 0.3 0.9 0.7
2001 31 23 19 0.2 0.9 0.7
20022 36 29 20 0.2 1.1 0.7
20033 52 42 30 0.3 1.7 1.0
*Low precision; no estimate reported.
-- Not available.
NOTE: Comparisons between years, particularly between recent estimates and those from 10 or more years prior, should be made with caution due to potential bias from reporting and other sources.
1 The numerator of each rate is the number of persons in the age group who initiated use of the drug in the specified year, while the denominator is the person-time exposure of persons in the age group measured in thousands of years.
2 Estimated using 2003 and 2004 data only.
3 Estimated using 2004 data only.
Source: SAMHSA, Office of Applied Studies, National Survey on Drug Use and Health, 2002, 2003, and 2004.

50428

Table 4.10C Standard Errors of Numbers (in Thousands) of Persons Who Initiated Nonmedical Use of Pain Relievers in the United States, Their Mean Age at First Use, and Rates of First Use (Per 1,000 Person-Years of Exposure): 1965-2003, Based on 2002-2004 NSDUHs
YEAR NUMBER OF INITIATES (1,000s) MEAN AGE AGE-SPECIFIC RATES1
All Ages Under 18 18 or Older 12-17 18-25
1965 30 14 26 3.5 * *
1966 16 11 11 3.5 0.5 *
1967 28 20 20 1.5 0.9 0.8
1968 41 25 33 0.8 1.1 1.4
1969 42 26 32 0.9 1.1 1.0
1970 47 30 37 1.2 1.2 1.3
1971 51 27 41 0.8 1.2 1.4
1972 47 20 42 0.8 0.8 1.4
1973 46 24 38 0.8 1.0 1.1
1974 47 26 39 0.7 1.1 1.2
1975 52 25 45 0.7 1.0 1.3
1976 45 24 37 0.9 1.0 0.9
1977 46 22 40 0.5 0.9 1.2
1978 42 25 32 0.6 1.1 0.9
1979 45 29 33 0.7 1.3 0.9
1980 45 23 38 0.8 1.0 0.8
1981 40 19 35 0.5 0.9 0.9
1982 39 23 33 1.0 1.0 0.8
1983 56 24 51 0.7 1.1 1.2
1984 45 16 43 1.1 0.8 1.0
1985 47 23 40 0.8 1.1 1.0
1986 53 15 52 0.9 0.7 1.1
1987 50 19 46 0.8 1.0 1.1
1988 44 16 41 0.7 0.8 1.1
1989 47 19 43 0.7 1.0 1.1
1990 43 15 40 0.6 0.8 1.1
1991 44 19 40 0.7 1.0 1.0
1992 51 20 48 0.7 1.0 1.2
1993 45 17 40 0.6 0.8 1.2
1994 55 17 51 0.7 0.8 1.2
1995 47 15 44 0.6 0.7 1.2
1996 51 15 49 0.4 0.7 1.6
1997 53 19 49 0.4 0.8 1.4
1998 55 21 52 0.6 0.9 1.2
1999 57 22 52 0.5 0.9 1.3
2000 68 26 61 0.5 1.1 1.5
2001 59 26 54 0.3 1.1 1.2
20022 75 33 68 0.5 1.4 1.5
20033 115 52 99 0.6 2.3 1.9
*Low precision; no estimate reported.
-- Not available.
NOTE: Comparisons between years, particularly between recent estimates and those from 10 or more years prior, should be made with caution due to potential bias from reporting and other sources.
1 The numerator of each rate is the number of persons in the age group who initiated use of the drug in the specified year, while the denominator is the person-time exposure of persons in the age group measured in thousands of years.
2 Estimated using 2003 and 2004 data only.
3 Estimated using 2004 data only.
Source: SAMHSA, Office of Applied Studies, National Survey on Drug Use and Health, 2002, 2003, and 2004.

50428

Table 4.11C Standard Errors of Numbers (in Thousands) of Persons Who Initiated Nonmedical Use of OxyContin® in the United States, Their Mean Age at First Use, and Rates of First Use (Per 1,000 Person-Years of Exposure): 1965-2003, Based on 2004 NSDUH
YEAR NUMBER OF INITIATES (1,000s) MEAN AGE AGE-SPECIFIC RATES1
All Ages Under 18 18 or Older 12-17 18-25
1965 * * * * * *
1966 * * * * * *
1967 * * * * * *
1968 * * * * * *
1969 * * * * * *
1970 * * * * * *
1971 * * * * * *
1972 * * * * * *
1973 * * * * * *
1974 * * * * * *
1975 * * * * * *
1976 * * * * * *
1977 * * * * * *
1978 * * * * * *
1979 * * * * * *
1980 * * * * * *
1981 * * * * * *
1982 * * * * * *
1983 * * * * * *
1984 * * * * * *
1985 * * * * * *
1986 * * * * * *
1987 * * * * * *
1988 * * * * * *
1989 * * * * * *
1990 * * * * * *
1991 * * * * * *
1992 8 * * * * *
1993 20 * * * * *
1994 * * * * * *
1995 8 4 * 5.6 0.2 *
1996 18 5 * 0.9 0.3 *
1997 25 8 23 0.9 0.4 0.7
1998 25 9 23 1.5 0.4 0.7
1999 27 11 26 1.5 0.5 0.6
2000 52 11 51 2.7 0.4 0.8
2001 55 15 55 1.4 0.6 1.2
2002 51 16 49 1.0 0.7 0.9
2003 64 19 62 1.5 0.8 1.0
*Low precision; no estimate reported.
-- Not available.
NOTE: Comparisons between years, particularly between recent estimates and those from 10 or more years prior, should be made with caution due to potential bias from reporting and other sources.
NOTE: OxyContin® was not approved for use by the U.S. Food and Drug Administration until December 12, 1995. Inferences made from data of respondents indicating use in or before 1995 should be made with caution.
1 The numerator of each rate is the number of persons in the age group who initiated use of the drug in the specified year, while the denominator is the person-time exposure of persons in the age group measured in thousands of years.
Source: SAMHSA, Office of Applied Studies, National Survey on Drug Use and Health, 2004.

50428

Table 4.12C Standard Errors of Numbers (in Thousands) of Persons Who Initiated Nonmedical Use of Tranquilizers in the United States, Their Mean Age at First Use, and Rates of First Use (Per 1,000 Person-Years of Exposure): 1965-2003, Based on 2002-2004 NSDUHs
YEAR NUMBER OF INITIATES (1,000s) MEAN AGE AGE-SPECIFIC RATES1
All Ages Under 18 18 or Older 12-17 18-25
1965 19 12 14 1.2 0.6 *
1966 27 * * 3.0 * *
1967 28 * 26 1.6 * 0.9
1968 31 9 30 1.1 0.4 1.0
1969 36 25 27 0.8 1.1 1.0
1970 32 22 23 0.6 1.0 0.9
1971 36 18 30 2.7 0.8 0.9
1972 48 24 42 0.7 1.0 1.4
1973 49 24 45 0.8 1.0 1.3
1974 46 29 35 0.4 1.2 1.2
1975 47 23 41 0.6 1.0 1.2
1976 46 27 38 0.8 1.1 1.0
1977 45 25 37 0.8 1.0 1.0
1978 39 20 34 0.8 0.9 0.9
1979 44 25 34 0.6 1.1 0.9
1980 34 20 29 0.5 0.9 0.9
1981 39 19 34 0.6