First Time Users of Hallucinogens (1965 - 2003)

Trends in Initiation of Hallucinogen Use (1965 - 2003)

Source: National Survey on Drug Use and Health

Table 4.5A 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 104 41 63 17.9 2.0 3.2
1966 146 59 87 19.8 2.7 3.5
1967 245 92 153 18.7 4.1 6.0
1968 393 188 204 18.7 8.3 7.3
1969 846 322 524 18.8 14.1 20.5
1970 945 408 537 18.3 18.0 21.6
1971 958 488 470 18.0 21.4 17.8
1972 1,041 521 521 17.7 22.6 19.8
1973 956 466 491 18.1 19.9 18.2
1974 970 481 489 18.7 20.4 16.6
1975 972 462 510 18.2 19.8 19.1
1976 953 441 512 19.1 19.1 17.8
1977 907 398 510 18.8 17.4 18.2
1978 943 452 491 18.2 19.9 17.8
1979 953 467 486 18.4 21.4 15.9
1980 1,015 439 576 19.1 20.6 18.6
1981 982 385 597 19.3 18.6 19.9
1982 985 383 602 20.0 18.5 18.9
1983 743 286 456 19.1 14.0 15.9
1984 705 263 442 19.3 13.0 15.1
1985 744 323 421 18.6 16.0 14.9
1986 837 328 509 19.4 16.9 17.2
1987 751 319 432 19.2 16.6 15.3
1988 757 296 461 19.1 15.8 16.2
1989 742 279 462 19.1 14.8 16.3
1990 654 283 371 19.5 15.1 12.1
1991 751 329 422 18.8 17.4 15.6
1992 726 332 394 18.8 16.9 14.1
1993 807 380 427 19.1 19.1 14.6
1994 943 470 473 18.1 23.3 18.4
1995 962 473 489 18.2 22.7 19.0
1996 1,050 510 540 18.8 23.9 21.1
1997 1,077 501 576 18.8 22.7 22.5
1998 1,104 514 590 18.8 22.5 21.9
1999 1,383 617 766 18.6 26.7 30.3
2000 1,522 664 858 19.1 28.2 32.1
2001 1,511 681 830 19.2 28.5 29.3
20022 1,141 530 610 18.6 21.5 22.0
20033 1,065 526 539 18.9 21.1 18.0
*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.

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