As the question of whether marijuana should be legal comes up for a vote in several U.S. states in this upcoming election, support for legal pot is at its highest in nearly 50 years, according to a new poll.

The poll, from Gallup, found that 60 percentage of Americans now say that using marijuana should be legal. That’s the highest level of support in the 47 years that Gallup has asked the question.

In 1969, when Gallup first surveyed Americans about whether they believed pot should be legal, only 12 percentage said yes. During the 1980 s and 1990 s, support for decriminalize pot hovered around 25 percentage. But since the year 2000, support for decriminalize marijuana has been on the rise.[ Healing Herb? Marijuana Could Treat These 5 Conditions]

The year 2013 marked the first time that more than 50 percentage of Americans polled said that they supported legalizing marijuana the same year that Colorado and Washington voted to decriminalize marijuana for recreational use, Gallup told. Last year, 58 percent of Americans said they believed using pot should be legal.

In the upcoming election on Nov. 8, five nations California, Arizona, Massachusetts, Maine and Nevada will vote on whether to legalize marijuana for recreational use. Recreational marijuana is currently legal in four states and the District of Columbia.

Support for legalizing marijuana has increased more among younger people, with those in older age group, Gallup told. From 2005 to 2016, support for legalizing marijuana increased 33 percentage points among those adults ages 18 to 34, compared to 26 percentage points among those ages 35 to 54, and 16 percentage points among those ages 55 and older. Currently, 77 percent of adults ages 18 to 34 subsistence decriminalize marijuana, compared with 45 percent of adults ages 55 and older.