I'll go ahead and state the obvious, hopefully citing such a recent statistic doesn't break any rules.

According to the 2010 US census, there are 2.9 million (0.9% of the population) Native Americans living in the United States.

If you're using a modern map, Hispanic Americans would make up a very large percentage of those with pre-1776 American ancestry.

Just wanted make sure those two aren't overlooked, I'll leave the rest up to the actual historians. Mods, no hard feelings if my comment is removed.

OP really has to clear up what "in the country" means in this question. It could be:

• The current boundary of the US.

• The current boundaries of the 13 states that were colonies.

• The boundaries claimed by the colonies at the time.

• It might also include Vermont to the above.

• Technically, prior to 1776, "the country" included England, Scotland, and Canada as well.