(CNN) - American support for same-sex marriage is rising steadily, a large new poll suggests, mirroring similar findings from another recent survey.
Backing for allowing gay and lesbian marriages rose from 29 percent in 2008 to 37 percent today, the Public Religion Research Institute announced Wednesday.
And a majority of young people back gay marriage, their survey found - 52 percent of 18-29 year-olds are in favor, while another 23 percent support civil unions.
The results jibe with findings from the Pew Forum on Religion & Public Life, another Washington think tank, which found last week that 42 percent of Americans favored gay marriage, while 48 percent opposed it.
It was the first time in the 15-year history of the Pew Forum asking the question that opposition to gay marriage fell below 50 percent, the think tank said.
The Public Religion Research Institute revealed its findings as it unveiled new information from its 2010 American Values Survey, a telephone poll of 3,013 American adults conducted from September 1-14.
Initial findings from the survey came out last week, and suggested that the Tea Party and the Christian conservative movement have more in common than the conventional wisdom thought.