Nearly 12 percent of couples living together are unmarried

The percentage of unmarried couples living together has increased ten-fold, from slightly more than one percent of all couples in 1960 to nearly 12 percent in 2011.

Cohabiting couples as a percent of all coresidential couples

Nearly 12 percent of couples living together are unmarried

Source: U.S. Census Bureau, Current Population Survey, 2011.