Data Dictionary: ACS 2012 (1-Year Estimates)
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Data Source: U.S. Census Bureau
Table: B19313G. Aggregate Income In The Past 12 Months (In 2012 Inflation-Adjusted Dollars) For The Population 15 Years And Over (Two Or More Races) [1]
Universe: Universe: Two or more races population 15 years and over
Table Details
B19313G. Aggregate Income In The Past 12 Months (In 2012 Inflation-Adjusted Dollars) For The Population 15 Years And Over (Two Or More Races)
Universe: Universe: Two or more races population 15 years and over
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 2012 Summary File: Technical Documentation.
 
Two or More Races
People may choose to provide two or more races either by checking two or more race response check boxes, by providing multiple responses, or by some combination of check boxes and other responses. The race response categories shown on the questionnaire are collapsed into the five minimum race groups identified by OMB, and the Census Bureau's "Some Other Race" category. For data product purposes, "Two or More Races" refers to combinations of two or more of the following race categories:

  1. White
  2. Black or African American
  3. American Indian or Alaska Native
  4. Asian
  5. Native Hawaiian or Other Pacific Islander
  6. Some Other Race

There are 57 possible combinations (see "Race Combinations" in Appendix A) involving the race categories shown above. Thus, according to this approach, a response of "White" and "Asian" was tallied as Two or More Races, while a response of "Japanese" and "Chinese" was not because "Japanese" and "Chinese" are both Asian responses.