10 in One opposite-sex married couples in U.S. say they 're of mixed races , census data show . ` Identifying as an interracial couple shifts over time , '' census spokeswoman Rose Kreider said . In 2000 , that figure was about 45 % . The rate of interracial partnerships is much higher among unmarried people . Of interracial opposite-sex married couples , Hispanics marry non-Hispanics most frequently .
10 in One opposite-sex married couples in U.S. say they 're of mixed races , census data show . In 2000 , that figure was about 45 % . The rate of interracial partnerships is much higher among unmarried people . Of interracial opposite-sex married couples , Hispanics marry non-Hispanics most frequently .