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Income 1998

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Table C.  Selected Measures of Household Income Dispersion:  1967 to 1998

(Income in 1998 dollars)

Measures of Income Dispersion           1998     1997     1996    1995    1990     1985  1980 2/  1975 3/     1970      1968    1967

Household Income at
 Selected Percentiles

20th percentile upper limit........   16,116   15,640   15,342   15,402   15,589   15,149   14,965   14,574   14,552   14,367   13,471
50th (median)......................   38,885   37,581   36,872   36,446   37,343   35,778   35,076   34,224   34,471   33,478   32,075
80th percentile upper limit........   75,000   72,614   70,659   69,654   68,848   66,365   62,784   59,446   57,863   54,858   53,170
95th percentile lower limit........  132,199  128,521  124,187  120,860  118,163  110,984  101,999   94,787   91,477   85,824   85,317


Household Income Ratios of
 Selected Percentiles

95th/20th..........................    8.20     8.22     8.09     7.85     7.58     7.33     6.82     6.50     6.29     5.97     6.33
95th/50th..........................    3.40     3.42     3.37     3.32     3.16     3.10     2.91     2.77     2.65     2.56     2.66
80th/50th..........................    1.93     1.93     1.92     1.91     1.84     1.85     1.79     1.74     1.68     1.64     1.66
80th/20th..........................    4.65     4.64     4.61     4.52     4.42     4.38     4.20     4.08     3.98     3.82     3.95
20th/50th..........................    0.41     0.42     0.42     0.42     0.42     0.42     0.43     0.43     0.42     0.43     0.42


Mean Household Income
 of Quintiles

Lowest quintile....................    9,223    9,010    8,930    8,931    8,973    8,782    8,879    8,800    8,008    7,921    7,301
Second quintile....................   23,288   22,442   21,917   21,816   22,486   21,708   21,428   20,894   21,293   20,935   19,906
Third quintile.....................   38,967   37,756   36,866   36,478   37,141   35,955   35,268   34,186   34,289   33,201   31,783
Fourth quintile....................   60,266   58,479   57,057   56,076   55,997   54,072   51,928   49,645   48,336   46,319   44,468
Highest quintile...................  127,529  124,676  120,005  117,021  108,671   99,741   91,211   86,457   85,581   81,120   80,584

Shares of Household Income
 of Quintiles

Lowest quintile....................      3.6     3.6      3.7      3.7      3.9      4.0      4.3      4.4      4.1      4.2      4.0
Second quintile....................      9.0     8.9      9.0      9.1      9.6      9.7     10.3     10.5     10.8     11.1     10.8
Third quintile.....................     15.0    15.0     15.1     15.2     15.9     16.3     16.9     17.1     17.4     17.5     17.3
Fourth quintile....................     23.2    23.2     23.3     23.3     24.0     24.6     24.9     24.8     24.5     24.4     24.2
Highest quintile...................     49.2    49.4     49.0     48.7     46.6     45.3     43.7     43.2     43.3     42.8     43.8

Gini coefficient of income inequali    0.456   0.459    0.455    0.450    0.428    0.419    0.403    0.397    0.394    0.388    0.399


1/  Reflects the implementation of 1990 census adjusted population controls, 1990
census sample re-design, a change in data collection method from paper-pencil to computer-assisted
interviewing (CAI), and changes in income reporting limits.  For detailed information concerning the impact of
these changes, see Current Population Reports, Series P60 -191, "A Brief Look at Postwar
U.S. Income Inequality."

2/  Reflects implementation of 1980 census population controls.

3/  Reflects implementation of 1970 census population controls.

Source:  U.S. Census Bureau, Current Population Surveys, selected March Supplements.  Data not available prior to 1967.

Source: U.S. Census Bureau | Income |  Last Revised: June 17, 2010