Pew Research Center shares some trends revealed by US public opinion surveys.

In the course of conducting public opinion surveys and demographic analyses, the Pew Research Center found a wide range of data milestones, breakthroughs, peaks and valleys in 2013, including record support for same-sex marriage and the legalization of marijuana; record levels of distrust of the federal government; record numbers of mothers who were the primary breadwinners for their families; and record numbers of Millennials living with their parents.