Reason - The share of American adults who admit to being pot smokers has nearly doubled in the last few years, from 7 percent in 2013 to 13 percent this year, according to Gallup poll numbers. The ongoing collapse of marijuana prohibition, which began with ballot initiatives approved in November 2012, probably has something to do with that, although it's not clear how much of the increase is due to rising cannabis consumption and how much to greater candor.
Gallup notes that "states' willingness to legalize marijuana could be a reason for the uptick in the percentage of Americans who say they smoke marijuana, regardless of whether it is legal in their particular state." As legal and social tolerance of marijuana increases, people may be more likely to use it, but they also may be more likely to admit using it. Notably, the share of Gallup respondents who say they have ever tried marijuana rose less dramatically (from 38 percent in 2013 to 43 percent in 2016) than the share who say they "smoke marijuana" currently, a touchier question