6/2/1924: Date U.S. government granted all American Indians citizenship under the Indian Citizenship Act

550: Number of federally recognized American Indian tribes

0.5: Percentage of Maine population that is American Indian

275: Approximate number of American Indian reservations in the U.S.

1.9 million: Number of people who listed themselves as American Indian on the last U.S. Census

Sources: Library of Congress; U.S. Census Bureau; www.factmonster.com