I have taken exception in the past with 1997 and 2002 U.S. Census and U.S. Department of Commerce estimated statistics on the number of American Indian owned businesses. Robert J. Miller, Reservation "Capitalism:" Economic Development in Indian Country 124 (Praeger Publishers, 2012).
There are currently several recent press stories about Census Bureau reports on this same subject.
This 2011 newspaper story reports in relevant part: "The number of privately owned Native American businesses in South Dakota grew by 32 percent between 2002 and 2007, according new figures released by the U.S. Census Bureau. But despite an increase of 426 minority-owned firms in five years, there is a significant “entrepreneurial disparity gap” that exists between minority and nonminority owners in both South Dakota and the U.S. nationwide, experts say.