The study of Midlife Development in the United States (2004-06) asked 4,759 people if they prefer to be with other people of the same ethnic group. Here are the percentages who said "not at all."
Native American 20.0*
*significantly different from whites at the 95% confidence level
All non-white groups are more likely than whites to prefer the company of their own. Whites are six times more likely than blacks to have a non-preferential attitude.