block_group2000	block_group2000
block_group2010	block_group2010
county2000	county2000
county2010	county2010
state2000	state2000
state2010	state2010
tract2000	tract2000
tract2010	tract2010
US_mean_center2010	US_mean_center2010
US_median_center2010	US_median_center2010
