Average THC Content in Seized
Sinsemilla Samples (1972 - 2004)

Number of Samples and Average THC Content of Seized Sinsemilla
Year Samples Avg THC %
1972 -- --
1973 -- --
1974 -- --
1975 -- --
1976 -- --
1977 15 3.20
1978 1 6.28
1979 10 3.66
1980 26 6.33
1981 31 6.58
1982 14 7.10
1983 17 7.87
1984 36 6.67
1985 52 7.28
1986 32 8.43
1987 43 7.93
1988 98 7.62
1989 86 6.95
1990 61 10.10
1991 75 10.53
1992 76 8.57
1993 123 5.77
1994 104 7.49
1995 164 7.51
1996 168 9.23
1997 111 11.62
1998 101 12.33
1999 136 13.38
2000 114 12.71
2001 234 9.56
2002 526 11.39
2003 529 11.63
2004 217 13.33

2004 data includes samples tested through Nov 8, 2004
Source: University of Mississippi, Marijuana Potency Monitoring Project*

* The Marijuana Potency Monitoring project is sponsored by the US National Institute on Drug Abuse. The sources of the numbers quoted here are as follows:
  1. ElSohly, M.A., et al "The Potency of Confiscated Marijuana, Hashish, and Hash Oil Over a Ten-Year Period," Journal of Forensic Sciences, Volume 29, No. 2, April 1984, pp. 500-514

  2. ElSohly M.A., et al "Potency Trends of delta-9 THC and Other Cannabinoids in Confiscated Marijuana from 1980-1997, Journal of Forensic Sciences, Volume 45, No. 1, 2000, pp. 24-30

  3. ElSohly M.A. National Center for Natural Products Research, School of Pharmacy, University of Mississippi, Quarterly Report, Potency Monitoring Project, Report #87, Aug 9, 2004 - Nov 8, 2004

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