The people over at Project Know have recently released a series of graphs that have monitored the number of times that a certain drug has been mentioned in “Rap Music.” The site states that “Hip-hop isn’t the first musical genre tied inextricably to drugs – just think back to the trippy tunes of the 1960s and 1970s. But rap’s celebration of all things intoxicating outpaces that of even its wildest pop-culture predecessors, by a long shot.” More info after the jump.