The majority of adults have been married
Since 1996, the share of ever-married adults has decreased. In 2009, two in three men and less than three in four women have ever been married. About one in five men and women has ever divorced.
Marital history for people age 15 and older, 1996 and 2009

Source: U.S. Census Bureau, Survey of Income and Program Participation (SIPP), 1996 and 2008.