Oh how the times have changed. In 1950, eight in 10 households were occupied by married couples. According to the 2000 U.S. Census, that number declined to 51.7%; the balance being singles and couples living together who are not married. The former includes individuals who either live alone or with roommates; the latter encompasses both opposite and same-sex couples who consider themselves partners. It is the latter segment which now makes up approximately 10% of American households.