Average THC Content in Seized Hash Oil Samples (1972 - 2008)

Hash Oil has traditionally been a scare commodity in the United States, as is reflected here in the low number of samples available for testing in most years. Hash oil is the strongest cannabis preparation as it is a concentrated extract of the psychoactive compounds contained in the cannabis plant.

Number of Samples and Average THC Content of Seized Hash Oil Year Samples Avg THC % 1972 -- -- 1973 6 22.00 1974 18 15.34 1975 29 13.09 1976 18 18.82 1977 17 18.89 1978 9 21.31 1979 9 20.91 1980 8 16.56 1981 5 17.45 1982 8 19.88 1983 30 21.36 1984 33 16.75 1985 25 15.08 1986 23 16.51 1987 22 13.36 1988 16 8.52 1989 9 11.96 1990 12 16.60 1991 10 13.07 1992 22 13.85 1993 17 16.52 1994 14 11.57 1995 13 13.23 1996 8 12.82 1997 10 18.20 1998 5 15.78 1999 11 16.21 2000 7 28.58 2001 7 19.44 2002 5 22.51 2003 4 15.54 2004 4 31.32 2005 6 6.40 2006 3 18.74 2007 18 24.85 2008 12 6.54

Sources: 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: ElSohly, M.A., et al "The Potency of Confiscated Marijuana, Hash Oil, and Hash Oil Over a Ten-Year Period," Journal of Forensic Sciences, Volume 29, No. 2, April 1984, pp. 500-514 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 ElSohly, M.A. National Center for Natural Products Research, School of Pharmacy, University of Mississippi, Quarterly Report, Potency Monitoring Project, Report #104, Dec 16, 2008 - Mar 15, 2009 Definition: (from ElSohly, et al) Hash Oil hash oil is a liquid or semi-solid preparation which is basically a concentrated extract of the cannabis plant material.

THC Content Overview	Sinsemilla	Marijuana
Hashish	Thai Stick	Ditchweed