| Date | Union | SPD | FDP | Verts | PDS/Die Linke | KPD | AFD | Deutsche Partei/GDP | GB-BHE/NPD | Autres |
| 1949-01-01 | 31 | 29.2 | 11.9 | | | 5.7 | | 4 | | 18.2 |
| 1953-01-01 | 45.2 | 28.8 | 9.5 | | | 2.2 | | 3.3 | 5.9 | 5.1 |
| 1957-01-01 | 50.2 | 31.8 | 7.7 | | | | | 3.4 | 4.6 | 2.3 |
| 1961-01-01 | 45.3 | 36.2 | 12.8 | | | | | | 2.8 | 2.9 |
| 1965-01-01 | 47.6 | 39.3 | 9.5 | | | | | | 2 | 1.6 |
| 1969-01-01 | 42.7 | 46.1 | 5.8 | | | | | | 4.3 | 1.1 |
| 1972-01-01 | 44.9 | 45.8 | 8.4 | | | | | | | 0.9 |
| 1976-01-01 | 48.6 | 42.6 | 7.9 | | | | | | | 0.9 |
| 1980-01-01 | 44.5 | 42.9 | 10.6 | 1.5 | | | | | | 0.5 |
| 1983-01-01 | 48.8 | 38.2 | 7 | 5.6 | | | | | | 0.4 |
| 1987-01-01 | 44.3 | 37 | 9.1 | 8.3 | | | | | | 1.3 |
| 1990-01-01 | 44.3 | 35.7 | 10.6 | 4.8 | | | | | | 4.6 |
| 1994-01-01 | 42.1 | 37.5 | 7.7 | 7.9 | | | | | | 4.8 |
| 1998-01-01 | 37 | 42.3 | 7 | 7.3 | | | | | | 6.4 |
| 2002-01-01 | 40.8 | 38.3 | 7.6 | 9.4 | | | | | | 3.9 |
| 2005-01-01 | 37.4 | 35.1 | 10.2 | 8.8 | 4.9 | | | | 1.1 | 2.4 |
| 2009-01-01 | 34.6 | 24.1 | 15.4 | 11.5 | 8.3 | | | | 1.2 | 4.9 |
| 2013-01-01 | 42.2 | 27.4 | 5.2 | 9.2 | 5.6 | | 4.4 | | 1 | 5 |
| 2017-01-01 | 34.1 | 21.9 | 11.4 | 9.8 | 7.4 | | 10.7 | | | 4.7 |
| 2021-01-01 | 25.6 | 26.1 | 11.9 | 15.9 | 3.7 | | 8.2 | | | 8.6 |
| 2025-01-01 | 30.7 | 17.6 | 4.6 | 12.7 | 7.9 | | 17.9 | | | 8.6 |
