Americans’ support for legal marijuana has steadily grown over time. When Gallup first asked the question, in 1969, 12% of Americans thought marijuana use should be legal, with little change in two early 1970s polls. By the late 1970s, support had increased to about 25%, and held there through the mid-1990s. The percentage of Americans who favored making use of the drug legal exceeded 30% by 2000 and was higher than 40% by 2009.

Over the past six years, support has vacillated a bit, but averaged 48% from 2010 through 2012 and has averaged above the majority level, 56%, since 2013.