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The percentage of Americans who say they currently smoke marijuana has nearly doubled since 2013 , a new survey finds .

Thirteen percent of adults in the U.S. now say they presently smoke toilet — up from 7 percent in 2013 , according to the raw Gallup poll .

Marijuana plants

The percentage of Americans who said they had ever try on marijuana also increased since 2013 . This twelvemonth , 43 percent of Americans said they had try out the drug — up from 38 percent in 2013 , according to the opinion poll . [ Where Americans fume and Grow Marijuana ( Maps ) ]

Recreationalmarijuana consumption is legalin four states ( Colorado , Washington , Alaska and Oregon ) and the District of Columbia . In addition , half of U.S. state have some version of a medical ganja law , harmonise to Gallup . In November , four more states will vote on whether to allowmedical marijuana .

the great unwashed ’s age and religiousness play key roles in whether they had ever tried marijuana , the Gallup researcher found . almost 1 in 5 U.S. adults under age 30 say they currently employ marijuana , fit in to the poll . In each of the older geezerhood groups the researcher looked at , no more than 1 in 10 people enounce they currently use marijuana .

A close-up image of the face of a bat with their wings folded under their face

However , more adults geezerhood 30 to 49 and 50 to 64 say they had ever essay marijuana than adults ages 18 to 29 . Nearly half of the adults ages 30 to 64 had adjudicate the drug at least once in their life , whereas only 38 percent of people ages 18 to 29 describe havingtried marijuana , the researchers see . The older groups may have been more likely to have tried the drug simply because they ’ve had more years to do so , or because attitude toward marijuana have changed over sentence , the investigator wrote .

Americans who said they attend church weekly were much less likely to fume marijuana than those who said they rarely or never go to church : Only 2 percentage of hebdomadal churchgoers said they presently smoke marijuana , liken with 14 percent of those who sound out they do not go to church , according to the pate .

adult in the western U.S. were more likely to cover that they currently fume marijuana liken with adults in the eastern , Midwest and southern U.S. , according to the poll . ( Asurvey from Julyfound that marijuana use was peculiarly high in San Francisco and Denver compared with the rest of the country . )

Artist�s impression of the measles virus

The result are based on telephone set interview with more than 1,000 adults in all 50 state and the District of Columbia . The interview were conducted July 13 - 17 , 2016 .

Originally published onLive scientific discipline .

A stock illustration of particles of HPV (in pink) amongst cells (in green)

A National Park Service sign on a brick wall with snowy mountains in the background.

a close-up of a child�s stomach with a measles rash

An illustration of particles of the measles virus in red and white against a dark background.

close up photo of a person handing a joint to a second person to smoke

Close-up image of a joint being passed from one person�s hands (on the right side of the image) to another (on the left side of the image). The hand on the left has a gold ringer on two fingers.

Two women laugh and smile as they run on treadmills.

microscopic image of the nematode c elegans. specific cells are stained bright green, and others are bright pink

close up of white, orange and pink gummies bears scattered on a table next to clumps of dried cannabis

Many people use cannabis to manage pain.

An image comparing the relative sizes of our solar system�s known dwarf planets, including the newly discovered 2017 OF201

a view of a tomb with scaffolding on it

an illustration showing a large disk of material around a star

A small phallic stalagmite is encircled by a 500-year-old bracelet carved from shell with Maya-like imagery

a person holds a GLP-1 injector

A man with light skin and dark hair and beard leans back in a wooden boat, rowing with oars into the sea