Everybody must get stoned. Three years after Bob Dylan penned these lyrics, a scant 12 percent of the nation believed marijuana should be legal. On Wednesday national pollsters Gallup announced that, for the first time, the majority of Americans want to legalize it.

With 58 percent support, the number of those favoring the drug has jumped a dramatic 10 percentage points since November 2012—with the momentum showing “no sign of abating,” Gallup notes.

The pollsters cite “changing social mores” and the “increasing prevalence of medical marijuana as a socially acceptable means of alleviating symptoms of diseases such as arthritis, and as a way to mitigate side effects of chemotherapy” as possible reasons for its growing acceptance. Also, they note that the success of legalization initiatives in both Colorado and Washington this past year may have “increased Americans’ tolerance” for legal marijuana.

“Whatever the reasons,” writes Art Swift, Gallup’s managing editor, “it is likely that this momentum will spur further legalization efforts across the United States.”