Data Dictionary: ACS 2009 -- 2011 (3-Year Estimates)
you are here: choose a survey survey data set table details
Data Source: U.S. Census Bureau
Table: B19129. Aggregate Family Income In The Past 12 Months (In 2011 Inflation-Adjusted Dollars) By Number Of Workers In Family [7]
Universe: Universe: Families
Table Details
B19129. Aggregate Family Income In The Past 12 Months (In 2011 Inflation-Adjusted Dollars) By Number Of Workers In Family
Universe: Universe: Families
Relevant Documentation:
Excerpt from: Social Explorer; U.S. Census Bureau; American Community Survey 2009-2011 Summary File: Technical Documentation.
 
Aggregate
An aggregate is the sum of the values for each of the elements in the universe. For example, aggregate household income is the sum of the incomes of all households in a given geographic area. Means are derived by dividing the aggregate by the appropriate universe. When an aggregate used as a numerator is rounded in the detailed (base) tables, the rounded value is used for the calculation of the mean.

Excerpt from: Social Explorer; U.S. Census Bureau; American Community Survey 2009-2011 Summary File: Technical Documentation.
 
Income of Families
In compiling statistics on family income, the incomes of all members 15 years old and over related to the householder are summed and treated as a single amount. Although the family income statistics cover the past 12 months, the characteristics of individuals and the composition of families refer to the time of interview. Thus, the income of the family does not include amounts received by individuals who were members of the family during all or part of the past 12 months if these individuals no longer resided with the family at the time of interview. Similarly, income amounts reported by individuals who did not reside with the family during the past 12 months but who were members of the family at the time of interview are included. However, the composition of most families was the same during the past 12 months as at the time of interview.