8 Implementation of a new CPS ASEC processing system. 9 Recording of amounts for earnings from longest job increased to $299,999. Full implementation of 1980 <strong>census</strong>-based sample design. 10 Implementation of Hispanic population weighting controls and introduction of 1980 <strong>census</strong>-based sample design. 11 Implementation of 1980 <strong>census</strong> population controls. Questionnaire expanded to allow the recording of up to 27 possible values from a list of 51 possible sources of income. 12 First year medians were derived using both Pareto and linear interpolation. Before this year, all medians were derived using linear interpolation. 13 Some of these estimates were derived using Pareto interpolation and may differ from published data that were derived using linear interpolation. 14 Implementation of a new CPS ASEC processing system. Questionnaire expanded to ask 11 income questions. 15 Full implementation of 1970 <strong>census</strong>-based sample design. 16 Introduction of 1970 <strong>census</strong> sample design and population controls. 17 Implementation of a new CPS ASEC processing system. 18 Questionnaire expanded to ask eight income questions. 19 Implementation of new procedures to impute missing data only. 20 Full implementation of 1960 <strong>census</strong>-based sample design and population controls. 21 Introduction of 1960 <strong>census</strong>-based sample design. Implementation of first hotdeck procedure to impute missing income entries. Source: U.S. Census Bureau, Current Population Survey, 1961 through 2006 Annual Social and Economic Supplements. U.S. Census Bureau Income, Poverty, and Health Insurance Coverage in the United States: 2005 39
Table A-3. Selected Measures of Household Income Dispersion:1967to2005 (Income in 2005 CPI-U-RS adjusted dollars. For further explanation of income inequality measures, see Current Population Reports, Series P60-204, ‘‘The Changing Shape of the Nation’s Income Distribution: 1947–1998’’) Measures of income dispersion 2005 2004 1 2003 2002 2001 2000 2 1999 3 1998 1997 1996 1995 4 1994 5 1993 6 1992 7 1991 1990 1989 1988 1987 8 1986 Household Income at Selected Percentiles 10th percentile upper limit . . 11,288 11,271 11,181 11,528 11,784 11,995 12,119 11,602 11,177 11,038 11,036 10,460 10,225 10,227 10,374 10,602 10,946 10,408 10,250 10,165 20th percentile upper limit . . 19,178 19,104 19,085 19,448 19,817 20,314 20,073 19,275 18,678 18,294 18,317 17,493 17,251 17,181 17,599 18,104 18,390 18,047 17,748 17,413 50th (median) ........... 46,326 45,817 45,970 46,036 46,569 47,599 47,671 46,508 44,883 43,967 43,346 42,038 41,562 41,774 42,108 43,366 43,946 43,168 42,827 42,309 80th percentile upper limit . . 91,705 90,945 92,185 91,202 92,083 92,688 92,813 89,703 86,721 84,256 82,840 81,878 80,221 79,095 79,334 79,953 81,656 80,221 79,477 78,139 90th percentile lower limit . . 126,090 124,908 125,436 123,872 125,308 126,960 126,252 121,159 118,453 114,030 111,556 110,597 108,746 105,743 106,065 107,319 109,393 106,236 104,852 102,555 95th percentile lower limit . . 166,000 162,408 163,555 162,831 165,969 164,617 166,340 158,116 153,490 148,084 143,740 143,089 139,209 135,019 134,742 137,223 139,489 135,792 132,993 131,030 Household Income Ratios of Selected Percentiles 90th/10th ............... 11.17 11.08 11.22 10.75 10.63 10.58 10.42 10.44 10.60 10.33 10.11 10.57 10.64 10.34 10.22 10.12 9.99 10.21 10.23 10.09 95th/20th . . . ............ 8.66 8.50 8.57 8.37 8.38 8.10 8.29 8.20 8.22 8.09 7.85 8.18 8.07 7.86 7.66 7.58 7.59 7.52 7.49 7.52 95th/50th ............... 3.61 3.57 3.57 3.54 3.57 3.46 3.52 3.41 3.43 3.40 3.32 3.41 3.37 3.27 3.21 3.17 3.17 3.16 3.11 3.10 80th/50th ............... 1.99 2.00 2.01 1.99 1.98 1.95 1.96 1.93 1.94 1.93 1.92 1.95 1.94 1.91 1.89 1.85 1.86 1.86 1.86 1.85 80th/20th . . . ............ 4.78 4.76 4.83 4.69 4.65 4.56 4.62 4.65 4.64 4.61 4.52 4.68 4.65 4.60 4.51 4.42 4.44 4.45 4.48 4.49 20th/50th ............... 0.42 0.42 0.42 0.42 0.43 0.43 0.42 0.42 0.42 0.42 0.42 0.42 0.42 0.42 0.42 0.42 0.42 0.42 0.42 0.41 Mean Household Income of Quintiles Lowest quintile. .......... 10,655 10,587 10,608 10,845 11,178 11,514 11,614 11,031 10,721 10,648 10,616 10,050 9,790 9,894 10,101 10,378 10,633 10,250 10,077 9,813 Second quintile .......... 27,357 27,089 27,250 27,572 28,086 28,748 28,518 27,854 26,802 26,135 25,946 25,047 24,819 24,791 25,369 26,112 26,455 25,873 25,611 25,240 Third quintile . . . ......... 46,301 45,896 46,256 46,462 47,011 47,874 47,735 46,607 45,091 43,959 43,384 42,196 41,603 41,766 42,139 43,131 43,976 43,273 42,818 42,236 Fourthquintile........... 72,825 72,368 73,218 73,085 73,709 74,423 74,293 72,081 69,840 68,036 66,691 65,661 64,654 64,115 64,236 65,030 66,518 65,413 64,721 63,629 Highest quintile .......... 159,583 156,502 156,082 156,038 160,975 161,272 158,432 152,531 148,898 143,096 139,175 138,039 134,704 124,233 123,179 126,199 130,031 124,881 123,082 120,434 Shares of Household Income of Quintiles Lowest quintile. .......... 3.4 3.4 3.4 3.5 3.5 3.6 3.6 3.6 3.6 3.6 3.7 3.6 3.6 3.8 3.8 3.8 3.8 3.8 3.8 3.8 Second quintile .......... 8.6 8.7 8.7 8.8 8.7 8.9 8.9 9.0 8.9 9.0 9.1 8.9 9.0 9.4 9.6 9.6 9.5 9.6 9.6 9.7 Third quintile ............ 14.6 14.7 14.8 14.8 14.6 14.8 14.9 15.0 15.0 15.1 15.2 15.0 15.1 15.8 15.9 15.9 15.8 16.0 16.1 16.2 Fourthquintile........... 23.0 23.2 23.4 23.3 23.0 23.0 23.2 23.2 23.2 23.3 23.3 23.4 23.5 24.2 24.2 24.0 24.0 24.2 24.3 24.3 Highest quintile .......... 50.4 50.1 49.8 49.7 50.1 49.8 49.4 49.2 49.4 49.0 48.7 49.1 48.9 46.9 46.5 46.6 46.8 46.3 46.2 46.1 Summary Measures Gini index of income inequality .............. 0.469 0.466 0.464 0.462 0.466 0.462 0.458 0.456 0.459 0.455 0.450 0.456 0.454 0.433 0.428 0.428 0.431 0.426 0.426 0.425 Mean logarithmic deviation of income. ............. 0.545 0.543 0.530 0.514 0.515 0.490 0.476 0.488 0.484 0.464 0.452 0.471 0.467 0.416 0.411 0.402 0.406 0.401 0.414 0.416 Theil .................. 0.411 0.406 0.397 0.398 0.413 0.404 0.386 0.389 0.396 0.389 0.378 0.387 0.385 0.323 0.313 0.317 0.324 0.314 0.311 0.310 Atkinson: e=0.25 ............... 0.098 0.097 0.095 0.095 0.098 0.096 0.092 0.093 0.094 0.093 0.090 0.092 0.092 0.080 0.078 0.078 0.080 0.078 0.077 0.077 e=0.50 ............... 0.192 0.190 0.187 0.186 0.189 0.185 0.180 0.181 0.183 0.179 0.175 0.180 0.178 0.160 0.156 0.156 0.158 0.155 0.155 0.155 e=0.75 ............... 0.289 0.286 0.283 0.279 0.282 0.275 0.268 0.271 0.272 0.266 0.261 0.268 0.266 0.242 0.237 0.236 0.239 0.236 0.238 0.237 See footnotes at end of table. 40 Income, Poverty, and Health Insurance Coverage in the United States: 2005 U.S. Census Bureau
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