… growth among the American Indian/Alaskan Native population over the … Bureau found that American Indians living on reservations were … data shows the American Indian population grew almost 16% … available. But the American Indian population also dropped in …… growth among the American Indian/Alaskan Native population over the … Bureau found that American Indians living on reservations were … data shows the American Indian population grew almost 16% … available. But the American Indian population also dropped in …