"For the first time in more than four decades of polling on the issue," reports the Pew Research Center, "a majority of Americans favor legalizing the use of marijuana. A national survey finds that 52% say that the use of marijuana should be made legal while 45% say it should not."

Here's the demographic breakdown:

The survey by the Pew Research Center, conducted March 13-17 among 1,501 adults, finds that young people are the most supportive of marijuana legalization. Fully 65% of Millennials –born since 1980 and now between 18 and 32 – favor legalizing the use of marijuana, up from just 36% in 2008. Yet there also has been a striking change in long-term attitudes among older generations, particularly Baby Boomers.

Half (50%) of Boomers now favor legalizing marijuana, among the highest percentages ever. In 1978, 47% of Boomers favored legalizing marijuana, but support plummeted during the 1980s, reaching a low of 17% in 1990. Since 1994, however, the percentage of Boomers favoring marijuana legalization has doubled, from 24% to 50%.

Generation X, born between 1965 and 1980, came of age in the 1990s when there was widespread opposition to legalizing marijuana. Support for marijuana legalization among Gen X also has risen dramatically – from just 28% in 1994 to 42% a decade later and 54% currently.

The Silent Generation continues to be less supportive of marijuana legalization than younger age cohorts. But the percentage of Silents who favor legalization has nearly doubled –from 17% to 32% – since 2002.