As union membership declines, income inequality increases: Union membership and share of income going to the top 10%, 1917–2019
| Year | Union membership | Share of income going to the top 10% |
|---|---|---|
| 1917 | 11.0% | 45.2% |
| 1918 | 12.1% | 44.2% |
| 1919 | 14.3% | 46.2% |
| 1920 | 17.5% | 44.4% |
| 1921 | 17.6% | 47.6% |
| 1922 | 14.0% | 46.3% |
| 1923 | 11.7% | 43.9% |
| 1924 | 11.3% | 45.9% |
| 1925 | 11.0% | 47.5% |
| 1926 | 10.7% | 47.8% |
| 1927 | 10.6% | 47.3% |
| 1928 | 10.4% | 48.4% |
| 1929 | 10.1% | 47.2% |
| 1930 | 10.7% | 46.5% |
| 1931 | 11.2% | 46.6% |
| 1932 | 11.3% | 48.6% |
| 1933 | 9.5% | 48.3% |
| 1934 | 9.8% | 49.3% |
| 1935 | 10.8% | 48.3% |
| 1936 | 11.1% | 48.6% |
| 1937 | 18.6% | 47.7% |
| 1938 | 23.9% | 47.3% |
| 1939 | 24.8% | 48.8% |
| 1940 | 23.5% | 49.1% |
| 1941 | 25.4% | 47.2% |
| 1942 | 24.2% | 42.5% |
| 1943 | 30.1% | 39.2% |
| 1944 | 32.5% | 36.3% |
| 1945 | 33.4% | 35.6% |
| 1946 | 31.9% | 37.2% |
| 1947 | 31.1% | 37.1% |
| 1948 | 30.5% | 39.1% |
| 1949 | 29.6% | 38.5% |
| 1950 | 30.0% | 39.2% |
| 1951 | 32.4% | 38.1% |
| 1952 | 31.5% | 36.9% |
| 1953 | 33.2% | 35.9% |
| 1954 | 32.7% | 36.2% |
| 1955 | 32.9% | 36.9% |
| 1956 | 33.2% | 35.9% |
| 1957 | 32.0% | 35.8% |
| 1958 | 31.1% | 35.6% |
| 1959 | 31.6% | 36.1% |
| 1960 | 30.7% | 35.6% |
| 1961 | 28.7% | 35.7% |
| 1962 | 29.1% | 36.1% |
| 1963 | 28.5% | 36.2% |
| 1964 | 28.5% | 36.4% |
| 1965 | 28.6% | 36.0% |
| 1966 | 28.7% | 35.6% |
| 1967 | 28.6% | 35.2% |
| 1968 | 28.7% | 34.9% |
| 1969 | 28.3% | 34.0% |
| 1970 | 27.9% | 33.7% |
| 1971 | 27.4% | 34.0% |
| 1972 | 27.5% | 34.2% |
| 1973 | 27.1% | 34.2% |
| 1974 | 26.5% | 33.9% |
| 1975 | 25.7% | 34.1% |
| 1976 | 25.7% | 34.1% |
| 1977 | 25.2% | 34.2% |
| 1978 | 24.7% | 34.1% |
| 1979 | 25.4% | 34.3% |
| 1980 | 23.6% | 34.0% |
| 1981 | 22.3% | 34.4% |
| 1982 | 21.6% | 34.9% |
| 1983 | 21.4% | 35.5% |
| 1984 | 20.5% | 36.0% |
| 1985 | 19.0% | 36.1% |
| 1986 | 18.5% | 36.0% |
| 1987 | 17.9% | 37.0% |
| 1988 | 17.6% | 38.6% |
| 1989 | 17.2% | 38.2% |
| 1990 | 16.7% | 38.3% |
| 1991 | 16.2% | 38.3% |
| 1992 | 16.2% | 39.4% |
| 1993 | 16.2% | 39.2% |
| 1994 | 16.1% | 39.1% |
| 1995 | 15.3% | 39.8% |
| 1996 | 14.9% | 40.6% |
| 1997 | 14.7% | 41.3% |
| 1998 | 14.2% | 41.7% |
| 1999 | 13.9% | 42.1% |
| 2000 | 13.5% | 42.7% |
| 2001 | 13.5% | 42.0% |
| 2002 | 13.3% | 41.7% |
| 2003 | 12.9% | 41.9% |
| 2004 | 12.5% | 42.5% |
| 2005 | 12.5% | 43.4% |
| 2006 | 12.0% | 44.2% |
| 2007 | 12.1% | 44.2% |
| 2008 | 12.4% | 44.2% |
| 2009 | 12.3% | 43.6% |
| 2010 | 11.9% | 44.6% |
| 2011 | 11.8% | 45.3% |
| 2012 | 11.3% | 46.2% |
| 2013 | 11.3% | 45.6% |
| 2014 | 11.1% | 46.1% |
| 2015 | 11.1% | 46.3% |
| 2016 | 10.7% | 46.2% |
| 2017 | 10.7% | 45.9% |
| 2018 | 10.5% | 45.9% |
| 2019 | 10.3% | 45.8% |
Source: Reproduced from Figure A in Heidi Shierholz, Working People Have Been Thwarted in Their Efforts to Bargain for Better Wages by Attacks on Unions, Economic Policy Institute, August 2019.
Reproduced from Figure A in Heidi Shierholz, Working People Have Been Thwarted in Their Efforts to Bargain for Better Wages by Attacks on Unions, Economic Policy Institute, August 2019. Data on union density follows the composite series found in Historical Statistics of the United States; updated to 2017 from unionstats.com. Income inequality (share of income to top 10%) data are from Thomas Piketty and Emmanuel Saez, “Income Inequality in the United States, 1913–1998,” Quarterly Journal of Economics 118, no. 1 (2003), and updated data from the Top Income Database, updated October 2020.