| Characteristic | House of Representatives | Senate |
|---|---|---|
| 115th Congress, 2017-18 | 4.1 | 5.7 |
| 114th Congress, 2015-16 | 5 | 5.6 |
| 113th Congress, 2013-14 | 5 | 6.9 |
| 112th Congress, 2011-12 | 5.3 | 6.3 |
| 111th Congress, 2009-10 | 7.4 | 7.1 |
| 110th Congress, 2007-08 | 7.6 | 6.3 |
| 109th Congress, 2005-06 | 8 | 7.6 |
| 108th Congress, 2003-04 | 7.8 | 8.3 |
| 107th Congress, 2001-02 | 6.4 | 7.1 |
| 106th  Congress, 1999-00 | 8 | 7.3 |
| 105th Congress, 1997-98 | 8 | 7.4 |
| 104th Congress, 1995-96 | 8.4 | 8.4 |
| 103rd Congress, 1993-94 | 7.1 | 8.6 |
| 102rd Congress, 1991-92 | 6.4 | 8 |
| 101st Congress, 1989-90 | 6 | 8.2 |
| 100th Congress, 1987-88 | 5.6 | 7.6 |
| 99th Congress, 1985-86 | 6.4 | 8.1 |
| 98th Congress, 1983-84 | 6.4 | 6.9 |
| 97th Congress, 1981-82 | 4.7 | 6.9 |
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Source
Source
Release date
December 2019
More information
Region
United States
Survey time period
1981 to 2018
Supplementary notes
Values prior to 2001-02 can be found , published by the U.S. Census Bureau.
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