| Average Cannabinoid Levels in Domestic Cannabis Samples by Year Seized | |||||
|---|---|---|---|---|---|
| Year | Number of Samples | Percent THC | Percent CBD | Percent CBC | Percent CBN |
| 1988 | 651 | 2.56 | .43 | .14 | .14 |
| 1989 | 511 | 2.00 | .59 | .12 | .08 |
| 1990 | 475 | 2.58 | .67 | .19 | .03 |
| 1991 | 943 | 2.57 | .87 | .21 | .03 |
| 1992 | 1025 | 2.96 | .45 | .30 | .03 |
| 1993 | 1346 | 2.75 | .48 | .20 | .01 |
| 1994 | 1210 | 3.02 | .50 | .25 | .02 |
| 1995 | 4,760 | 3.75 | .31 | .20 | .31 |
| 1996 | 2,431 | 4.07 | .42 | .23 | .23 |
| 1997 | 2,455 | 4.53 | .40 | .25 | .20 |
| 1998 | 2,263 | 4.43 | .41 | .22 | .23 |
| 1999 | 2,658 | 4.55 | .43 | .21 | .38 |
| 2000 | 3,114 | 4.87 | .45 | .21 | .34 |
| 2001 | 2,696 | 5.31 | .47 | .23 | .28 |
| 2002 | 2,392 | 6.35 | .42 | .25 | .22 |
| 2003 | 2,497 | 6.28 | .46 | .24 | .23 |
| 2004 | 2,608 | 7.09 | .46 | .25 | .28 |
| 2005 | 2,951 | 7.17 | .45 | .27 | .32 |
| 2006 | 2,856 | 7.51 | .41 | .24 | .26 |
| 2007 | 3,026 | 8.21 | .41 | .25 | .24 |
| 2008 | 2,700 | 8.60 | .37 | .26 | .32 |
| 2009 | 3,034 | 8.20 | .35 | .26 | .37 |
| 2010 | 2,665 | 9.53 | .27 | .26 | .43 |
| 2011 | 2,342 | 11.13 | .22 | .25 | .45 |
| 2012 | 2,099 | 12.27 | .20 | .24 | .56 |
| 2013 | 1,226 | 12.00 | .16 | .26 | .62 |
| 2014 | 891 | 12.09 | .15 | .23 | .59 |
| 2015 | 749 | 10.99 | .19 | .22 | .68 |
Notes:THC = Delta-9-Tetrahydrocannabinol, CBN = Cannabidiol, CBC = Cannabichromene and CBN = Cannabinol.
