Data Dictionary: ACS 2005 -- 2009 (5-Year Estimates)
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Data Source: U.S. Census Bureau
Table: B00001. Unweighted Sample Count Of The Population [1]
Universe: Total population
Table Details
B00001. Unweighted Sample Count Of The Population
Universe: Total population
Variable Label
B00001001
Relevant Documentation:
Excerpt from: Social Explorer; U.S. Census Bureau; American Community Survey 2005-2009 Summary File: Technical Documentation.
 
Limitation of the data
Beginning in 2006, the population in group quarters (GQ) was included in the ACS. Some types of GQ populations have sex distributions that are very different from the household population. The inclusion of the GQ population could therefore have a noticeable impact on the sex distribution. This is particularly true for a given geographic area. This is particularly true for areas with a substantial GQ population. The Census Bureau tested the changes introduced to the 2008 version of the sex question in the 2007 ACS Grid-Sequential Test (www.census.gov/acs). The results of this testing show that the changes may introduce an inconsistency in the data produced for this question as observed from the years 2007 to 2008.