Past-year marijuana use was reported by 4.1% in 2001–2002 and 9.5% in 2012–2013, a significant increase between 2001–2002 and 2012–2013 (Table 1). Significant increases were seen across all population subgroups. Comparing 2001–2002 with 2012–2013, increases were particularly notable among women (2.6% vs 6.9%), black individuals (4.7% vs 12.7%), Hispanic individuals (3.3% vs 8.4%), those in the South (2.9% vs 7.7%), and middle-aged (1.6% vs 5.9%) and older (0.04% vs 1.3%) adults.
