Median Year Structure Built - B25035001 - Median Year Structure Built - American Community Survey 2009 (ACS09) - Survey ACS 2009 (1-Year Estimates)

Data Dictionary:

ACS 2009 (1-Year Estimates)

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Survey: ACS 2009 (1-Year Estimates)

Data Source:

U.S. Census Bureau

Data set: American Community Survey 2009 (ACS09)

Table:

B25035. Median Year Structure Built [1]

Universe: Housing units

Variable Details

B25035.	Median Year Structure Built
	Universe: Housing units
	B25035001Median Year Structure Built Percent base: None - percentages not computed Aggregation method: Median, using bracket table: B25034, interpolation method: Linear

Relevant Documentation:

Excerpt from:	Social Explorer; U.S. Census Bureau; American Community Survey 2009 Summary File: Technical Documentation.
	ACS 2009-1yr Summary File: Technical Documentation -> Appendix A. Supplemental Documentation -> 2009 Subject Definitions -> Housing Variables -> Year Structure Built -> Median Year Structure Built

Median Year Structure Built

Median year structure built divides the distribution into two equal parts: one-half of the cases falling below the median year structure built and one-half above the median. Median year structure built is computed on the basis of a standard distribution (See the "Standard Distributions" section under "Appendix A".) The median is rounded to the nearest calendar year. Median age of housing can be obtained by subtracting median year structure built from survey year. For example, if the median year structure built is 1969, the median age of housing in that area is 40 years (2009 minus 1969). (For more information on medians, see "Derived Measures".)