Generally, he said, younger people support marijuana legalization and older people oppose it.

Thus, as more young people become of voting age, support is changing.

“Generally, attitudes on marijuana use have relaxed over the years,” King said.

The survey results support that notion.

Younger age groups were more supportive of more lenient marijuana laws, with the majority of 18- to 24-year-olds and 25- to 29-year-olds in favor of allowing personal use.

In addition, 91 percent of 18- to 24-year-olds favor allowing medical marijuana, “declining linearly” to 63 percent of those 75 and older.

The only age group in which a majority thought that small marijuana possession should result in jail was those 75 and older.

Men were more in favor of personal legalization than women, but the genders were about equal in support of medical legalization.

Men were also more likely to be against jail time for possession of small amounts of marijuana.

The same set of questions was asked for the 2014 survey, which had 768 respondents, with a margin of error of plus or minus 3.5 percent.