According to a report from the United States Census Bureau, the percentage of married-couple households that are interracial or interethnic in the U.S. grew from 7.4% in 2000 to 10.2% during the span of 2012-2016. This growth varied by state and for specific interracial/interethnic combination types—seven of which were identified in the data. The largest of these is non-Hispanic whites married to Hispanics, which increased in 43.2 percent of counties. Two states, Hawaii and Oklahoma, and the District of Columbia, held the most growth. 

See the full report, including detailed maps and infographics, on the U.S. Census website.