Recently, the Substance Abuse and Mental Health Services Administration (SAMHSA) released a state-by-state drug use report that is both useful and informative. These government reports, like others regarding drug use, are based on surveys and the willingness of respondents to be truthful about their illicit drug use.
According to SAMHSA, what states had the highest and lowest marijuana rates of cannabis use? Rhode Island (16.2%) and Utah (7.17%) respectively.
The New York Times‘ Economix blog created some helpful interactive mapping to illustrate the SAMSHA data.