some "Real Numbers":
In Census 2000, 4.3 million people, or 1.5 percent of the total U.S. population, reported that they were American Indian and Alaska Native.
This number included 2.4 million people, or 1 percent, who reported only American Indian and Alaska Native as their race.
http://www.census.gov/population/www/socdemo/race/censr-28.pdf10% of the higher count would be 430,000 people.
90% of the lower count would be 2,000,000 people
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FedEx Field seats over 90,000 people.
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the population of Washington DC is over 572,059 inhabitants.
http://quickfacts.census.gov/qfd/states/11000.html