Sixty-six percent of Americans now support legalizing marijuana, another new high in Gallup's trend over nearly half a century.

The latest figure marks the third consecutive year that support on the measure has increased and established a new record.

Legalizing the use of pot was an unpopular idea when Gallup first asked Americans about it in 1969 -- just 12% at that time said it should be made legal.

Support grew in the 1970s but stagnated in the 20% range until the new millennium, when momentum for legalization picked up again. 

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Justin McCarthy ~ Gallup.com ~