| 2022 | Democratic | 370,089 | 53.1% | | | Republican | 326,224 | 46.9% | |
| 2018 | Democratic | 394,780 | 57.9% | | | Republican | 286,822 | 42.1% | |
| 2014 | Democratic | 261,203 | 52.5% | | | Republican | 236,699 | 47.5% | |
| 2010 | Democratic | 320,562 | 55.2% | | | Republican | 259,974 | 44.8% | |
| 2006 | Democratic | 332,545 | 60.6% | | | Republican | 216,399 | 39.4% | |
| 1998 | Democratic | 251,795 | 53.2% | | | Republican | 221,224 | 46.8% | |
| 1994 | Democratic | 258,499 | 67.3% | | | Republican | 0 | 0.0% | | | Independent | 125,370 | 32.7% | |
| 1990 | Democratic | 240,547 | 62.0% | | | Republican | 147,387 | 38.0% | |
| 1986 | Democratic | 210,351 | 58.1% | | | Republican | 151,665 | 41.9% | |
| 1982 | Democratic | 211,785 | 56.5% | | | Republican | 162,881 | 43.5% | |
| 1978 | Democratic | 194,339 | 63.7% | | | Republican | 110,814 | 36.3% | |
| 1974 | Democratic | 182,176 | 61.4% | | | Republican | 114,308 | 38.6% | |
| 1970 | Democratic | 147,810 | 54.7% | | | Republican | 116,160 | 43.0% | | | Other | 6,093 | 2.3% | |
| 1968 | Democratic | 150,294 | 50.5% | | | Republican | 144,216 | 48.5% | | | Other | 2,884 | 1.0% | |
| 1966 | Democratic | 123,191 | 49.4% | | | Republican | 125,968 | 50.6% | | | Other | 2 | 0.0% | |
| 1964 | Democratic | 190,586 | 61.7% | | | Republican | 118,377 | 38.3% | | | Other | 1 | 0.0% | |
| 1962 | Democratic | 140,712 | 59.6% | | | Republican | 95,319 | 40.4% | |
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