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While Americans' cigarette use is in steep decline, future changes in their use of marijuana and alcohol are uncertain.
Americans are split right down the middle over whether they think marijuana's effect on society is positive or negative. Their views about its effect on users tilt slightly positive.
More than two in three Americans (68%) support legalizing marijuana, matching the record high reached a year ago.
The percentage of Americans who have tried marijuana has increased to a new high of 49%, as younger generations have been more likely than older generations to have tried it.
A record-high 68% of Americans support legalizing marijuana, including majorities of most demographic groups.
Fifty years after Woodstock became the symbol of 1960s social upheaval, Gallup trends highlight how much has changed in U.S. society.
Find out where Americans stand on four key issues that were on the ballot in several states: marijuana legalization, the death penalty, gun control and increasing the minimum wage.