Data Dictionary: ACS 2006 -- 2010 (5-Year Estimates)
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Data Source: U.S. Census Bureau
Universe: White alone population 15 years and over
Variable Details
B19313A. Aggregate Income In The Past 12 Months (In Inflation-Adjusted Dollars) For The Population 15 Years And Over (White Alone)
Universe: White alone population 15 years and over
B19313A001Aggregate income in the past 12 months (in inflation-adjusted dollars)
Percent base:
None - percentages not computed (variable is table universe)
Aggregation method:
Addition
Relevant Documentation:
Aggregate Income
Aggregate income is the sum of all incomes for a particular universe. Aggregate income is subject to rounding, which means that all cells in a matrix are rounded to the nearest hundred dollars. (For more information, see "Aggregate" under "Derived Measures.")

Excerpt from: Social Explorer; U.S. Census Bureau; American Community Survey 2006-2010 Summary File: Technical Documentation.
 
White
A person having origins in any of the original peoples of Europe, the Middle East, or North Africa. It includes people who indicate their race as "White" or report entries such as Irish, German, Italian, Lebanese, Arab, Moroccan, or Caucasian.