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2002 National Survey on Drug Use & Health:   Detailed Tables

30416

Table 4.1C Standard Errors of Numbers (in Thousands) of Persons Who First Used Marijuana During the Years 1965 to 2001, Their Mean Age at First Use, and Annual Age-Specific Rates of First Use (Per 1,000 Person-Years of Exposure): Based on 2002 NSDUH
YEAR NUMBER OF INITIATES (1,000s) MEAN
AGE		 AGE-SPECIFIC RATES1
All Ages Under 18 18 or Older 12–17 18–25
1965 151 108 106 0.8 4.9 4.9
1966 108 50 90 0.8 2.2 3.9
1967 161 96 127 0.5 4.2 5.4
1968 188 103 152 0.5 4.4 6.0
1969 226 101 204 0.5 4.2 8.3
1970 220 120 185 0.3 4.8 8.3
1971 215 127 171 0.3 5.2 7.6
1972 194 126 131 0.5 5.1 5.0
1973 218 133 166 0.4 5.4 7.3
1974 207 138 155 0.4 6.0 6.7
1975 208 137 141 0.3 5.8 6.2
1976 205 156 138 0.6 7.1 5.9
1977 206 139 153 0.5 6.3 5.7
1978 204 163 126 0.5 7.5 5.9
1979 192 138 134 0.6 6.2 5.5
1980 174 122 128 0.7 5.4 6.1
1981 181 122 135 0.5 5.8 6.7
1982 161 111 113 0.8 5.2 4.7
1983 151 117 98 0.5 5.2 4.8
1984 147 105 97 0.5 5.1 4.7
1985 155 123 89 0.4 5.9 4.7
1986 146 108 100 0.4 5.2 5.1
1987 135 96 95 0.7 4.6 4.8
1988 124 89 75 0.5 4.5 4.2
1989 135 106 82 0.4 5.2 4.4
1990 107 78 75 0.3 3.9 4.0
1991 131 85 105 0.8 4.3 4.8
1992 119 73 89 0.3 3.7 4.9
1993 106 66 83 0.2 3.3 4.4
1994 116 62 92 0.2 3.0 5.0
1995 121 65 103 0.3 3.0 5.7
1996 97 66 69 0.2 3.1 3.6
1997 108 70 80 0.3 3.2 4.2
1998 94 63 69 0.5 3.0 3.4
1999 96 62 68 0.4 3.0 3.7
2000 93 72 54 0.2 3.4 3.3
2001 78 54 59 0.2 2.7 2.9
*Low precision; no estimate reported.
-- Not available.
1 The numerator of each rate is the number of persons in the age group who first used the drug in the year, while the denominator is the person-time exposure measured in thousands of years.
Source: SAMHSA, Office of Applied Studies, National Survey on Drug Use and Health, 2002.

30416

Table 4.2C Standard Errors of Numbers (in Thousands) of Persons Who First Used Cocaine During the Years 1965 to 2001, Their Mean Age at First Use, and Annual Age-Specific Rates of First Use (Per 1,000 Person-Years of Exposure): Based on 2002 NSDUH
YEAR NUMBER OF INITIATES (1,000s) MEAN
AGE		 AGE-SPECIFIC RATES1
All Ages Under 18 18 or Older 12–17 18–25
1965 46 * * * * *
1966 * * * * * *
1967 * * * * * *
1968 66 * 37 1.2 * 1.4
1969 44 * 40 1.4 * 1.3
1970 66 36 56 0.4 1.4 2.1
1971 98 33 92 1.2 1.3 3.0
1972 70 40 57 1.1 1.5 2.0
1973 96 48 83 0.9 1.8 2.6
1974 137 47 128 1.1 1.8 3.0
1975 119 56 105 0.5 2.1 3.1
1976 132 50 121 0.6 1.9 3.7
1977 119 56 105 0.9 2.1 3.0
1978 136 49 122 0.6 1.9 3.1
1979 124 59 105 0.5 2.3 3.1
1980 163 62 152 0.9 2.5 3.5
1981 132 55 127 0.6 2.2 3.4
1982 120 57 105 0.6 2.3 2.6
1983 132 44 125 0.3 1.8 4.2
1984 123 53 120 0.6 2.2 3.3
1985 118 47 107 0.6 2.0 2.8
1986 106 41 100 0.8 1.8 2.7
1987 108 58 92 0.7 2.5 2.8
1988 109 43 100 0.9 1.9 2.8
1989 105 31 101 0.8 1.4 2.9
1990 102 39 93 0.7 1.8 2.5
1991 79 46 66 0.6 2.1 2.0
1992 97 33 91 1.1 1.5 2.0
1993 73 19 70 0.7 0.9 2.1
1994 75 18 73 0.9 0.8 2.5
1995 67 23 64 0.6 1.0 2.1
1996 72 28 65 1.0 1.2 1.9
1997 76 28 69 0.7 1.1 1.9
1998 63 28 55 0.5 1.2 1.7
1999 78 23 72 0.5 0.9 1.8
2000 69 27 61 0.6 1.1 1.6
2001 74 30 66 0.5 1.2 1.5
*Low precision; no estimate reported.
-- Not available.
1 The numerator of each rate is the number of persons in the age group who first used the drug in the year, while the denominator is the person-time exposure measured in thousands of years.
Source: SAMHSA, Office of Applied Studies, National Survey on Drug Use and Health, 2002.

30416

Table 4.3C Standard Errors of Numbers (in Thousands) of Persons Who First Used Crack During the Years 1965 to 2001, Their Mean Age at First Use, and Annual Age-Specific Rates of First Use (Per 1,000 Person-Years of Exposure): Based on 2002 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 54 * 54 1.2 * 1.2
1979 45 * 45 1.6 * 1.0
1980 50 * 35 2.0 * 0.8
1981 41 * 38 1.1 * 1.0
1982 55 * 47 2.0 * 0.8
1983 56 * 54 2.5 * 0.9
1984 57 * 55 1.0 * 1.3
1985 78 21 75 2.4 0.9 1.3
1986 57 * 54 2.2 * 0.9
1987 57 * 53 1.3 * 1.3
1988 71 12 70 1.4 0.5 1.0
1989 63 * 63 0.7 * 1.6
1990 86 10 85 1.4 0.5 1.1
1991 72 26 62 0.9 1.2 1.0
1992 84 19 82 1.5 0.9 1.4
1993 46 10 45 1.4 0.4 0.8
1994 67 11 66 1.3 0.5 1.5
1995 73 10 72 1.5 0.4 1.4
1996 55 12 53 1.4 0.5 0.9
1997 61 13 59 1.1 0.5 1.2
1998 45 16 41 1.0 0.7 1.0
1999 48 11 47 1.1 0.5 0.7
2000 54 17 51 1.5 0.7 0.8
2001 44 13 42 2.0 0.5 0.6
*Low precision; no estimate reported.
-- Not available.
1 The numerator of each rate is the number of persons in the age group who first used the drug in the year, while the denominator is the person-time exposure measured in thousands of years.
Source: SAMHSA, Office of Applied Studies, National Survey on Drug Use and Health, 2002.

30416

Table 4.4C Standard Errors of Numbers (in Thousands) of Persons Who First Used Heroin During the Years 1965 to 2001, Their Mean Age at First Use, and Annual Age-Specific Rates of First Use (Per 1,000 Person-Years of Exposure): Based on 2002 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 40 * 39 0.9 * 1.4
1972 35 12 33 0.9 0.5 1.1
1973 60 11 59 1.5 0.4 1.6
1974 68 * 60 0.9 * 1.8
1975 25 * 24 2.4 * 0.6
1976 33 * 31 1.8 * 0.6
1977 35 * 35 0.7 * 1.0
1978 30 * 21 0.7 * 0.6
1979 32 * 30 1.2 * 0.7
1980 * * * * * *
1981 39 * 38 0.8 * 1.0
1982 33 * 32 1.1 * 0.8
1983 33 * 33 0.7 * *
1984 38 * 30 1.5 * 0.7
1985 19 * 19 * * 0.3
1986 35 * 21 1.4 * *
1987 52 * 52 1.0 * 1.4
1988 24 * 24 1.9 * 0.7
1989 31 * 28 2.3 * *
1990 11 * 11 * * *
1991 29 * 29 1.3 * 0.5
1992 24 * 24 1.1 * 0.6
1993 14 4 * 0.8 0.2 *
1994 27 5 27 2.0 0.2 *
1995 35 8 34 1.9 0.3 0.3
1996 24 7 23 1.5 0.3 0.6
1997 23 8 22 2.0 0.3 0.6
1998 37 7 36 1.0 0.3 0.8
1999 27 9 26 3.4 0.4 0.2
2000 20 9 18 0.8 0.3 0.6
2001 23 9 21 1.9 0.4 0.4
*Low precision; no estimate reported.
-- Not available.
1 The numerator of each rate is the number of persons in the age group who first used the drug in the year, while the denominator is the person-time exposure measured in thousands of years.
Source: SAMHSA, Office of Applied Studies, National Survey on Drug Use and Health, 2002.

30416

Table 4.5C Standard Errors of Numbers (in Thousands) of Persons Who First Used Hallucinogens During the Years 1965 to 2001, Their Mean Age at First Use, and Annual Age-Specific Rates of First Use (Per 1,000 Person-Years of Exposure): Based on 2002 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 58 21 54 4.4 * 1.5
1967 73 59 43 1.3 2.5 1.5
1968 94 75 57 0.7 3.1 2.2
1969 104 57 96 0.6 2.3 3.5
1970 132 62 116 0.4 2.5 4.5
1971 138 71 117 0.8 2.7 3.9
1972 110 73 84 0.4 2.8 2.9
1973 104 69 91 0.5 2.7 3.4
1974 101 66 74 0.5 2.5 2.5
1975 101 65 78 0.4 2.5 2.7
1976 100 72 73 0.4 2.8 2.6
1977 103 71 74 0.4 2.7 2.6
1978 102 64 81 0.3 2.5 2.9
1979 116 76 82 0.4 3.0 2.7
1980 106 64 83 0.6 2.6 2.6
1981 106 62 85 0.6 2.6 2.7
1982 109 53 95 1.6 2.1 2.0
1983 97 63 68 0.6 2.6 2.1
1984 91 51 77 1.0 2.1 2.2
1985 83 46 69 0.5 1.9 2.2
1986 89 63 64 0.7 2.7 1.9
1987 94 65 59 0.8 2.8 2.0
1988 100 61 80 0.5 2.7 2.6
1989 77 47 62 0.4 2.2 2.1
1990 81 51 65 0.7 2.3 2.0
1991 81 51 61 0.4 2.4 2.1
1992 71 42 57 0.5 1.9 1.8
1993 75 35 65 0.4 1.6 2.3
1994 87 38 79 0.3 1.7 2.9
1995 64 34 53 0.3 1.5 2.0
1996 74 33 64 1.4 1.4 2.1
1997 79 38 63 0.7 1.6 2.3
1998 68 35 60 0.4 1.5 2.2
1999 76 40 62 0.2 1.7 2.3
2000 72 43 59 0.3 1.8 2.0
2001 71 38 61 0.3 1.6 1.9
*Low precision; no estimate reported.
-- Not available.
1 The numerator of each rate is the number of persons in the age group who first used the drug in the year, while the denominator is the person-time exposure measured in thousands of years.
Source: SAMHSA, Office of Applied Studies, National Survey on Drug Use and Health, 2002.

30416

Table 4.6C Standard Errors of Numbers (in Thousands) of Persons Who First Used LSD During the Years 1965 to 2001, Their Mean Age at First Use, and Annual Age-Specific Rates of First Use (Per 1,000 Person-Years of Exposure): Based on 2002 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 56 25 50 1.3 * 1.7
1968 102 90 48 0.6 3.7 1.8
1969 93 43 90 0.6 1.7 3.2
1970 126 65 96 0.3 2.6 3.7
1971 111 50 100 0.9 1.9 3.1
1972 108 68 83 0.5 2.6 2.8
1973 98 59 91 0.6 2.3 3.3
1974 94 72 61 0.3 2.7 2.2
1975 95 59 74 0.7 2.3 2.2
1976 83 51 64 0.3 1.9 2.2
1977 93 65 67 0.6 2.5 2.2
1978 84 51 64 0.3 2.0 2.2
1979 83 57 60 0.3 2.2 2.0
1980 102 65 82 0.4 2.6 2.6
1981 95 54 78 0.4 2.2 2.4
1982 86 49 70 1.4 2.0 1.5
1983 83 58 58 0.5 2.4 1.8
1984 82 51 67 1.1 2.1 1.8
1985 73 42 60 0.9 1.8 1.7
1986 67 46 52 0.7 2.0 1.6
1987 72 59 39 0.6 2.5 1.1
1988 76 55 55 0.3 2.4 1.8
1989 69 43 54 0.7 2.0 1.5
1990 71 49 50 0.7 2.2 1.5
1991 75 48 57 0.4 2.2 2.0
1992 70 42 55 0.4 1.9 1.8
1993 64 27 58 0.4 1.2 1.9
1994 76 34 68 0.4 1.5 2.4
1995 55 29 45 0.2 1.3 1.7
1996 66 32 56 0.4 1.4 2.1
1997 59 30 49 0.4 1.2 1.6
1998 52 32 41 0.3 1.3 1.5
1999 51 32 39 0.3 1.3 1.2
2000 55 31 48 0.3 1.3 1.7
2001 38 26 28 0.3 1.1 0.9
*Low precision; no estimate reported.
-- Not available.
1 The numerator of each rate is the number of persons in the age group who first used the drug in the year, while the denominator is the person-time exposure measured in thousands of years.
Source: SAMHSA, Office of Applied Studies, National Survey on Drug Use and Health, 2002.

30416

Table 4.7C Standard Errors of Numbers (in Thousands) of Persons Who First Used PCP During the Years 1965 to 2001, Their Mean Age at First Use, and Annual Age-Specific Rates of First Use (Per 1,000 Person-Years of Exposure): Based on 2002 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 * 12 * * 0.4 *
1970 60 27 53 0.7 1.1 2.0
1971 50 24 44 0.6 0.9 1.6
1972 86 53 68 1.9 2.0 1.4
1973 68 37 56 0.6 1.4 1.9
1974 68 37 56 0.6 1.4 1.7
1975 65 53 38 0.5 2.0 1.1
1976 77 53 61 1.1 2.0 1.6
1977 74 42 61 0.7 1.6 1.8
1978 77 37 67 1.2 1.4 1.6
1979 61 40 46 0.6 1.5 1.3
1980 60 38 45 1.7 1.5 1.0
1981 55 34 43 0.9 1.4 1.2
1982 42 23 35 0.8 0.9 1.0
1983 49 34 35 0.6 1.4 1.0
1984 38 * 37 0.6 * 1.1
1985 40 22 33 1.0 0.9 0.9
1986 40 24 30 1.4 1.0 0.7
1987 36 * 19 1.7 * 0.5
1988 42 29 30 1.0 1.3 0.9
1989 34 25 22 1.4 1.1 0.6
1990 24 12 20 3.6 0.6 *
1991 27 * 19 1.8 * 0.4
1992 43 12 41 0.6 0.6 1.3
1993 20 9 18 2.0 0.4 *
1994 24 9 21 0.4 0.4 0.7
1995 33 12 31 0.9 0.5 1.0
1996 18 13 12 0.5 0.5 0.4
1997 22 11 19 0.6 0.5 0.6
1998 23 15 17 0.8 0.6 0.5
1999 27 14 22 1.0 0.6 0.8
2000 19 15 11 0.3 0.6 0.4
2001 17 15 8 0.2 0.6 0.3
*Low precision; no estimate reported.
-- Not available.
1 The numerator of each rate is the number of persons in the age group who first used the drug in the year, while the denominator is the person-time exposure measured in thousands of years.
Source: SAMHSA, Office of Applied Studies, National Survey on Drug Use and Health, 2002.

30416

Table 4.8C Standard Errors of Numbers (in Thousands) of Persons Who First Used Ecstasy During the Years 1965 to 2001, Their Mean Age at First Use, and Annual Age-Specific Rates of First Use (Per 1,000 Person-Years of Exposure): Based on 2002 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 43 * * * * *
1977 * * * * * *
1978 * * * * * *
1979 23 * * * * *
1980 * * * * * *
1981 * * * * * *
1982 * * * * * *
1983 46 * * * * *
1984 19 * 19 1.0 * 0.5
1985 36 * 33 0.8 * 0.9
1986 36 * 32 0.9 * 0.9
1987 46 * 42 2.0 * 1.1
1988 47 27 39 0.8 1.2 1.1
1989 39 * 33 0.7 * 1.0
1990 46 * 42 1.6 * 0.9
1991 44 * 43 1.2 * 1.2
1992 38 13 36 0.7 * 1.1
1993 42 6 41 1.0 0.3 1.0
1994 42 8 41 1.2 0.3 1.0
1995 58 14 57 1.4 0.6 1.7
1996 62 14 59 3.8 0.6 1.0
1997 70 15 68 1.2 0.6 2.1
1998 64 19 61 0.5 0.8 1.7
1999 86 30 78 0.5 1.2 2.2
2000 96 40 89 0.5 1.6 2.1
2001 87 35 81 0.4 1.4 1.9
*Low precision; no estimate reported.
-- Not available.
1 The numerator of each rate is the number of persons in the age group who first used the drug in the year, while the denominator is the person-time exposure measured in thousands of years.
Source: SAMHSA, Office of Applied Studies, National Survey on Drug Use and Health, 2002.

30416

Table 4.9C Standard Errors of Numbers (in Thousands) of Persons Who First Used Inhalants During the Years 1965 to 2001, Their Mean Age at First Use, and Annual Age-Specific Rates of First Use (Per 1,000 Person-Years of Exposure): Based on 2002 NSDUH
YEAR NUMBER OF INITIATES (1,000s) MEAN
AGE		 AGE-SPECIFIC RATES1
All Ages Under 18 18 or Older 12–17 18–25
1965 29 27 * 1.0 1.2 *
1966 68 68 * 0.4 2.9 *
1967 47 24 * 3.2 0.7 *
1968 76 42 * 2.7 1.6 *
1969 54 41 36 0.9 1.7 *
1970 62 46 41 0.8 1.8 1.5
1971 57 53 21 0.4 2.1 0.8
1972 67 45 49 2.1 1.7 1.3
1973 84 52 66 2.0 1.9 0.9
1974 78 44 64 1.1 1.6 1.8
1975 84 68 43 0.6 2.4 1.4
1976 91 72 53 0.6 2.7 1.7
1977 122 67 98 0.7 2.6 2.6
1978 87 62 60 0.6 2.4 1.8
1979 111 81 76 0.5 3.2 2.2
1980 86 66 57 1.5 2.7 1.2
1981 72 48 53 0.6 2.0 1.4
1982 78 58 53 0.7 2.3 1.4
1983 86 74 45 1.0 2.9 1.4
1984 80 57 56 1.0 2.3 1.4
1985 76 47 60 1.3 2.0 1.3
1986 77 58 50 1.4 2.5 1.2
1987 82 63 52 1.0 2.7 1.4
1988 71 50 50 0.5 2.2 1.6
1989 74 46 59 1.5 2.0 1.9
1990 57 42 40 0.6 1.9 1.3
1991 60 40 41 0.6 1.9 1.1
1992 62 44 43 0.4 2.0 1.4
1993 61 36 48 0.4 1.7 1.6
1994 50 32 37 0.5 1.3 1.2
1995 50 31 38 0.3 1.3 1.4
1996 46 29 38 0.7 1.1 1.1
1997 52 35 37 0.5 1.2 1.3
1998 58 35 44 0.7 1.4 1.4
1999 52 35 37 0.5 1.4 1.2
2000 65 42 43 0.5 1.6 1.2
2001 49 39 30 0.2 1.7 1.2
*Low precision; no estimate reported.
-- Not available.
1 The numerator of each rate is the number of persons in the age group who first used the drug in the year, while the denominator is the person-time exposure measured in thousands of years.
Source: SAMHSA, Office of Applied Studies, National Survey on Drug Use and Health, 2002.

30416

Table 4.10C Standard Errors of Numbers (in Thousands) of Persons Who First Used Pain Relievers During the Years 1965 to 2001, Their Mean Age at First Use, and Annual Age-Specific Rates of First Use (Per 1,000 Person-Years of Exposure): Based on 2002 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 36 * * * * *
1967 45 * 26 * * 1.1
1968 106 62 86 1.1 * 3.4
1969 63 45 44 1.2 1.8 1.1
1970 67 43 51 2.1 1.1 1.8
1971 93 56 68 1.6 2.1 1.5
1972 75 33 68 1.8 1.2 1.8
1973 81 46 67 0.9 1.6 2.1
1974 80 35 72 1.0 1.2 2.0
1975 100 51 86 1.4 1.9 1.8
1976 88 59 64 0.9 2.2 1.8
1977 91 32 86 0.9 1.2 2.2
1978 87 59 60 0.6 2.2 1.7
1979 72 52 51 1.6 2.0 1.3
1980 88 38 79 1.5 1.5 1.2
1981 65 29 57 0.9 1.2 1.6
1982 61 42 46 2.0 1.6 1.1
1983 97 27 94 0.8 1.1 2.5
1984 77 27 72 1.5 1.1 1.4
1985 95 34 87 1.4 1.4 1.8
1986 87 30 82 1.2 1.3 2.0
1987 81 37 73 2.0 1.5 1.5
1988 67 37 57 0.8 1.6 1.4
1989 83 41 76 1.2 1.9 1.8
1990 77 24 74 1.3 1.1 1.8
1991 75 36 68 1.4 1.7 1.7
1992 87 32 79 1.0 1.4 1.8
1993 76 23 70 0.6 1.0 2.2
1994 88 24 84 0.7 1.0 1.9
1995 84 25 80 0.7 1.0 2.2
1996 82 30 77 0.7 1.2 2.4
1997 87 37 79 0.8 1.5 1.9
1998 111 40 105 1.3 1.5 1.7
1999 92 40 81 0.7 1.7 2.2
2000 138 46 135 1.5 1.9 2.3
2001 98 49 85 0.5 2.1 1.8
*Low precision; no estimate reported.
-- Not available.
1 The numerator of each rate is the number of persons in the age group who first used the drug in the year, while the denominator is the person-time exposure measured in thousands of years.
Source: SAMHSA, Office of Applied Studies, National Survey on Drug Use and Health, 2002.

30416

Table 4.11C Standard Errors of Numbers (in Thousands) of Persons Who First Used Tranquilizers During the Years 1965 to 2001, Their Mean Age at First Use, and Annual Age-Specific Rates of First Use (Per 1,000 Person-Years of Exposure): Based on 2002 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 60 * 59 2.8 * *
1968 46 * 42 0.7 * 1.7
1969 66 32 68 1.4 1.3 2.1
1970 52 46 24 1.5 1.8 *
1971 51 35 37 1.2 1.4 1.1
1972 81 40 71 1.3 1.5 1.7
1973 107 48 96 1.5 1.8 2.3
1974 71 48 52 0.5 1.7 1.6
1975 78 41 66 0.8 1.6 1.6
1976 86 60 62 0.9 2.2 1.8
1977 103 56 85 1.2 2.1 1.9
1978 80 45 65 1.9 1.7 1.3
1979 77 40 63 1.0 1.5 1.4
1980 59 34 48 0.7 1.3 1.3
1981 60 28 53 1.4 1.1 1.3
1982 61 26 55 1.4 1.1 1.3
1983 86 20 84 1.0 0.5 2.4
1984 72 27 66 1.1 1.1 1.1
1985 79 25 75 2.2 1.0 1.2
1986 92 22 89 3.1 0.9 1.2
1987 72 21 69 1.2 0.9 1.1
1988 77 24 72 1.7 1.1 1.5
1989 63 28 55 1.2 1.2 1.3
1990 64 27 58 2.0 1.3 1.3
1991 69 13 68 1.3 0.6 1.6
1992 76 19 74 2.7 0.8 1.3
1993 77 28 71 1.1 1.3 1.3
1994 62 17 60 1.3 0.7 1.5
1995 65 19 62 0.9 0.8 1.5
1996 67 20 63 0.6 0.8 1.6
1997 57 20 54 1.2 0.8 1.4
1998 87 26 82 1.5 1.1 1.5
1999 65 28 60 0.6 1.1 1.1
2000 82 30 75 0.9 1.2 1.5
2001 69 30 59 0.7 1.2 1.2
*Low precision; no estimate reported.
-- Not available.
1 The numerator of each rate is the number of persons in the age group who first used the drug in the year, while the denominator is the person-time exposure measured in thousands of years.
Source: SAMHSA, Office of Applied Studies, National Survey on Drug Use and Health, 2002.

30416

Table 4.12C Standard Errors of Numbers (in Thousands) of Persons Who First Used Stimulants During the Years 1965 to 2001, Their Mean Age at First Use, and Annual Age-Specific Rates of First Use (Per 1,000 Person-Years of Exposure): Based on 2002 NSDUH
YEAR NUMBER OF INITIATES (1,000s) MEAN
AGE		 AGE-SPECIFIC RATES1
All Ages Under 18 18 or Older 12–17 18–25
1965 97 * 75 1.8 * 2.7
1966 66 * 63 1.2 * 2.8
1967 57 43 38 2.2 1.8 *
1968 106 44 91 0.4 1.9 3.7
1969 86 53 68 0.6 2.1 2.7
1970 120 60 101 0.8 2.4 3.5
1971 112 42 102 0.8 1.6 3.6
1972 90 50 74 0.7 1.9 2.6
1973 83 45 70 0.7 1.7 2.2
1974 73 42 59 0.5 1.6 2.0
1975 82 56 60 0.9 2.0 1.6
1976 98 60 77 0.9 2.3 2.2
1977 88 53 68 0.5 2.0 2.0
1978 69 53 44 0.6 2.0 1.3
1979 93 51 76 0.4 2.0 2.3
1980 93 51 78 0.4 2.0 2.4
1981 93 34 81 1.0 1.4 2.0
1982 77 49 60 0.6 1.9 1.8
1983 81 40 70 0.9 1.6 1.4
1984 82 41 61 1.3 1.7 1.3
1985 49 28 40 0.8 1.2 1.1
1986 58 34 46 0.7 1.5 1.4
1987 75 45 60 1.0 1.9 1.3
1988 56 39 40 0.9 1.7 1.0
1989 57 27 50 0.8 1.2 1.5
1990 69 49 48 0.9 2.2 1.3
1991 44 28 35 0.9 1.3 1.0
1992 50 32 40 1.0 1.5 1.0
1993 62 22 57 0.7 1.0 1.6
1994 62 21 55 1.1 0.9 1.4
1995 59 22 56 0.8 0.9 1.6
1996 72 21 70 0.9 0.9 2.0
1997 61 28 54 1.1 1.1 1.1
1998 60 29 53 0.9 1.2 1.2
1999 49