Data about race and ethnicity are self-reported to the Census Bureau. Since the 2000 census, Congress has authorized people to identify themselves according to more than one racial classification by selecting more than one category. Only one ethnicity may be selected, however, because the U.S. Census recognizes only two ethnicities—Hispanic and Non-Hispanic—which are mutually exclusive since you can be one or the other, but not both. The Census Bureau defines "Hispanic" as any person who has an ancestral connection to Latin America.