In 2000, 7 percent of opposite-sex married couples were interracial or interethnic, which grew to 10 percent in 2010. Those couples are primarily located in the western and southwestern parts of the United States as well as Alaska and Hawaii, the data showed.
More opposite-sex unmarried couples were interracial or interethnic -- 18 percent -- than married couples, and 21 percent of same-sex couples fell within the category, the census said.
Other census findings show the increase of non-family households between 2000 and 2010 was double that of family households, defined as a home where two or more people who are related by birth, marriage or adoption live together.
Non-family households increased 16 percent from 34 million in 2000 to 39 million in 2010, the data showed. Family households increased by 8 percent from 72 million in 2000 to 78 million a decade later.
Exploding whale video goes viral on Internet
Reindeer recovered after escaping from Santa during lighting ceremony