Shows that Colorado 12 to 17 age group, 18 to 25, 26+ are significantly higher than US average for past 30 day marijuana use and all showed increased rates between 2011-12 and 2012-13
Links
[1] http://www.samhsa.gov/data/sites/default/files/NSDUHStateEst2012-2013-p1/ChangeTabs/NSDUHsaeShortTermCHG2013.htm
[2] http://rethinkpot.org/tags/survey
[3] http://rethinkpot.org/tags/samhsa
[4] http://rethinkpot.org/tags/usage