Most of the "percentage thc" numbers floated about are kind of bullshit. Lab tests can determine thc content but how many growers besides medical mj ones send their bud off for a lab analysis? Nevertheless, data from the University of Mississippi's Potency Monitoring program found that the average potency of marijuana has jumped from 3.4 percent THC in 1993 to 12.3 percent THC in 2012. Scientists at the lab say they've seen samples as high as 36 percent. "“High Times†magazine, with a cover promoting “The Strongest Strains on Earth,†claims to have analyzed 15 strains of pot with potencies ranging between 25 to 28 percent THC. Marijuana near that strength can be bought at many legal retail shops and medical dispensaries across the U.S." edit - link - PBS: Is pot getting more potent?
Why would you create an account for a forum to ask a question that an Internet search could tell you?
Don't listen to this guy! There is 74 Tee-H-See in weed. I think hash is like 12. Or maybe none. I dunno.