According to a study done by the Pew Research Center, Non-Hispanic caucasians with American Indian ancestry make up half of the current population of mixed-race Americans. However, they don’t usually claim to be multiracial.
Multiracial Americans make up 2.1 percent of the adult population, according to the U.S. Census Bureau. During its survey from which the report was drawn, Pew asked respondents about their race, that race of their parents and that of their grandparents. The “Multiracial in America” report contends that 6.9 percent of the United States population is of mixed race.
Read the Multiracial in America report at the Pew Research Center website.