United States and States - R2503. Percent of Housing Units That Were Built in 1939 or Earlier

United States and States

R2503. Percent of Housing Units That Were Built in 1939 or Earlier: 2007
Universe: Total housing units

Data Set: 2007 American Community Survey 1-Year Estimates
Survey: American Community Survey, Puerto Rico Community Survey

NOTE. For information on confidentiality protection, sampling error, nonsampling error, and definitions, see Survey Methodology.

Rank	State	Percent	Margin of Error
1	Massachusetts	36.7	+/-0.4
2	District of Columbia	35.7	+/-1.2
3	Rhode Island	35.1	+/-1.2
4	New York	34.8	+/-0.2
5	Iowa	29.0	+/-0.5
6	Maine	28.9	+/-0.6
6	Pennsylvania	28.9	+/-0.3
8	Vermont	28.6	+/-1.0
9	Nebraska	24.5	+/-0.6
10	Connecticut	24.3	+/-0.5
11	Illinois	23.1	+/-0.3
12	New Hampshire	22.6	+/-0.8
13	Wisconsin	22.4	+/-0.3
14	Ohio	22.2	+/-0.2
15	South Dakota	21.3	+/-0.9
16	Indiana	19.9	+/-0.3
17	New Jersey	19.5	+/-0.3
18	Kansas	19.4	+/-0.5
19	Minnesota	18.6	+/-0.3
20	West Virginia	18.4	+/-0.6
21	North Dakota	18.1	+/-0.8
22	Montana	16.7	+/-0.7
23	Michigan	16.3	+/-0.2
24	Missouri	16.2	+/-0.3
	United States	14.5	+/-0.1
25	Oregon	12.9	+/-0.3
26	Maryland	12.7	+/-0.3
27	Wyoming	12.4	+/-0.9
28	Kentucky	11.7	+/-0.4
28	Washington	11.7	+/-0.3
30	California	9.9	+/-0.1
31	Delaware	9.6	+/-0.6
31	Idaho	9.6	+/-0.6
33	Oklahoma	9.4	+/-0.3
34	Colorado	9.1	+/-0.3
35	Utah	8.8	+/-0.4
36	Virginia	8.6	+/-0.3
37	Tennessee	7.4	+/-0.3
38	Louisiana	7.1	+/-0.3
39	Alabama	6.8	+/-0.3
40	Arkansas	6.6	+/-0.3
41	North Carolina	6.3	+/-0.2
42	South Carolina	6.0	+/-0.3
43	New Mexico	5.8	+/-0.3
44	Mississippi	5.7	+/-0.3
45	Georgia	5.3	+/-0.2
46	Hawaii	4.9	+/-0.4
46	Texas	4.9	+/-0.1
48	Alaska	2.5	+/-0.4
49	Florida	2.2	+/-0.1
50	Arizona	1.8	+/-0.1
51	Nevada	1.1	+/-0.1



	Puerto Rico	3.3	+/-0.2

Rank	State	Percent	Margin of Error

Source: U.S. Census Bureau, 2007 American Community Survey

Data are based on a sample and are subject to sampling variability. The degree of uncertainty for an estimate arising from sampling variability is represented through the use of a margin of error. The value shown here is the 90 percent margin of error. The margin of error can be interpreted roughly as providing a 90 percent probability that the interval defined by the estimate minus the margin of error and the estimate plus the margin of error (the lower and upper confidence bounds) contains the true value. In addition to sampling variability, the ACS estimates are subject to nonsampling error (for a discussion of nonsampling variability, see Accuracy of the Data). The effect of nonsampling error is not represented in these tables.
·While the 2007 American Community Survey (ACS) data generally reflect the December 2006 Office of Management and Budget (OMB) definitions of metropolitan and micropolitan statistical areas; in certain instances the names, codes, and boundaries of the principal cities shown in ACS tables may differ from the OMB definitions due to differences in the effective dates of the geographic entities. The 2007 Puerto Rico Community Survey (PRCS) data generally reflect the December 2005 Office of Management and Budget (OMB) definitions of metropolitan and micropolitan statistical areas; in certain instances the names, codes, and boundaries of the principal cities shown in PRCS tables may differ from the OMB definitions due to differences in the effective dates of the geographic entities.
·Estimates of urban and rural population, housing units, and characteristics reflect boundaries of urban areas defined based on Census 2000 data. Boundaries for urban areas have not been updated since Census 2000. As a result, data for urban and rural areas from the ACS do not necessarily reflect the results of ongoing urbanization.

Explanation of Symbols:
1. An '**' entry in the margin of error column indicates that either no sample observations or too few sample observations were available to compute a standard error and thus the margin of error. A statistical test is not appropriate.
2. An '-' entry in the estimate column indicates that either no sample observations or too few sample observations were available to compute an estimate, or a ratio of medians cannot be calculated because one or both of the median estimates falls in the lowest interval or upper interval of an open-ended distribution.
3. An '-' following a median estimate means the median falls in the lowest interval of an open-ended distribution.
4. An '+' following a median estimate means the median falls in the upper interval of an open-ended distribution.
5. An '***' entry in the margin of error column indicates that the median falls in the lowest interval or upper interval of an open-ended distribution. A statistical test is not appropriate.
6. An '*****' entry in the margin of error column indicates that the estimate is controlled. A statistical test for sampling variability is not appropriate.
7. An 'N' entry in the estimate and margin of error columns indicates that data for this geographic area cannot be displayed because the number of sample cases is too small.
8. An '(X)' means that the estimate is not applicable or not available. Selected migration, earnings, and income data are not available for certain geographic areas due to problems with group quarters data collection and imputation. See Errata Note #44 for details.

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