Changing Attitudes on Gay Marriage
Roughly six-in-ten Democrats and independents now favor same-sex marriage.
Most Republicans continue to oppose same-sex marriage.
Source: Aggregated data from Pew Research Center polls conducted in each year.
2013 figures are based on one poll from March 2013. Question wording can be found here (PDF),
and information on the Pew Research Centerís polling methodology can be foundm here.