| 2022 | Democratic | 388,592 | 55.3% | | | Republican | 314,023 | 44.7% | |
| 2018 | Democratic | 427,583 | 61.8% | | | Republican | 231,296 | 33.4% | | | Other | 32,931 | 4.8% | |
| 2014 | Democratic | 295,008 | 58.3% | | | Republican | 211,303 | 41.7% | |
| 2010 | Democratic | 317,523 | 53.6% | | | Republican | 275,255 | 46.4% | |
| 2006 | Democratic | 318,000 | 56.8% | | | Republican | 241,715 | 43.2% | |
| 2002 | Democratic | 273,175 | 57.1% | | | Republican | 179,718 | 37.6% | | | Other | 25,191 | 5.3% | |
| 1998 | Democratic | 250,487 | 51.4% | | | Republican | 236,446 | 48.6% | |
| 1994 | Democratic | 277,225 | 60.9% | | | Republican | 177,822 | 39.1% | |
| 1990 | Democratic | 265,582 | 67.6% | | | Republican | 127,364 | 32.4% | |
| 1986 | Democratic | 185,627 | 49.9% | | | Republican | 186,317 | 50.1% | |
| 1982 | Democratic | 234,184 | 61.6% | | | Republican | 146,264 | 38.4% | |
| 1978 | Democratic | 206,140 | 100.0% | | | Republican | 0 | 0.0% | |
| 1974 | Democratic | 157,463 | 51.0% | | | Republican | 151,121 | 49.0% | |
| 1970 | Democratic | 161,628 | 60.1% | | | Republican | 107,247 | 39.9% | |
| 1968 | Democratic | 161,441 | 53.7% | | | Republican | 139,056 | 46.3% | |
| 1966 | Democratic | 127,473 | 51.4% | | | Republican | 120,429 | 48.6% | | | Other | 5 | 0.0% | |
| 1964 | Democratic | 187,826 | 60.9% | | | Republican | 120,721 | 39.1% | | | Other | 1 | 0.0% | |
| 1962 | Democratic | 140,694 | 59.3% | | | Republican | 96,670 | 40.7% | |
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