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Data Dictionary: ACS 2009 (3-Year Estimates)
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Data Source: U.S. Census Bureau
Universe: Households
Variable Details
B19080. Household Income Quintile Upper Limits
Universe: Households
B19080004Fourth Quintile
Percent base:
None - percentages not computed
Aggregation method:
Quintile -- can not be aggregated -- No totals are displayed for this variable when multiple geographies are selected
Relevant Documentation:
Excerpt from: Social Explorer; U.S. Census Bureau; American Community Survey 2007-2009 Summary File: Technical Documentation.
Income of Households
This includes the income of the householder and all other individuals 15 years old and over in the household, whether they are related to the householder or not. Because many households consist of only one person, average household income is usually less than average family income. Although the household income statistics cover the past 12 months, the characteristics of individuals and the composition of households refer to the time of interview. Thus, the income of the household does not include amounts received by individuals who were members of the household during all or part of the past 12 months if these individuals no longer resided in the household at the time of interview. Similarly, income amounts reported by individuals who did not reside in the household during the past 12 months but who were members of the household at the time of interview are included. However, the composition of most households was the same during the past 12 months as at the time of interview.

Income Quintile Upper Limits
Negative incomes are converted to zero for these measures. These measures are the quintile cutoffs, along with the 95th percentile of the distribution. (For more information on quintiles, see "Derived Measures".)