Read Me File for Summary File 4 (SF 4)


The geographic selections in the *geo.txt file may not have matching data values in the data.txt files. This is because data Summary File 2 is subject to two population thresholds:

	- Tables for any population group excluded from SF 2 because the group's total population in a specific geographic area did not meet the SF 2 threshold of 100 people are excluded from SF 4. 
        - Tables in SF 4 shown for any of the above population groups will only be shown if there are at least 50 unweighted sample cases in a specific geographic area. 
        - The same 50 unweighted sample cases also applied to ancestry iterations. 

 	            	 
For complete information about this data set, consult the technical documentation available at:

http://www.census.gov/prod/cen2000/doc/sf4.pdf
