| Year,Republican,Democratic,Third parties | |
| 2016,"70.1% 2,000",25.9% 740,4.0% 115 | |
| 2012,"46.9% 1,126","49.4% 1,186",3.6% 87 | |
| 2008,35.9% 902,"61.0% 1,535",3.1% 78 | |
| 2004,29.5% 871,"69.8% 2,064",0.7% 22 | |
| 2000,34.7% 827,"64.1% 1,525",1.2% 29 | |
| 1996,20.9% 421,"64.4% 1,298",14.7% 296 | |
| 1992,17.6% 444,"71.1% 1,796",11.3% 285 | |
| 1988,23.3% 550,"76.2% 1,797",0.4% 10 | |
| 1984,26.2% 601,"73.4% 1,683",0.4% 10 | |
| 1980,24.6% 551,"74.4% 1,668",1.0% 22 | |
| 1976,18.5% 455,"80.7% 1,987",0.8% 19 | |
| 1972,34.0% 782,"65.3% 1,499",0.7% 16 | |
| 1968,23.6% 515,"63.5% 1,387",13.0% 284 | |
| 1964,13.7% 323,"86.2% 2,026",0.1% 2 | |
| 1960,31.3% 789,"68.7% 1,734",0.0% 0 | |
| 1956,"32.5% 1,033","67.5% 2,143",0.0% 0 | |
| 1952,23.3% 629,"76.7% 2,074",0.0% 0 | |
| 1948,16.3% 410,"83.2% 2,095",0.6% 14 | |
| 1944,23.0% 514,"77.0% 1,721",0.0% 0 | |
| 1940,24.0% 634,"76.1% 2,013",0.0% 0 | |
| 1936,23.8% 480,"76.2% 1,539",0.0% 0 | |
| 1932,15.1% 382,"84.9% 2,150",0.0% 0 | |
| 1928,31.3% 601,"68.7% 1,317",0.0% 0 | |
| 1924,26.2% 614,"72.5% 1,702",1.3% 31 | |
| 1920,32.6% 860,"66.9% 1,764",0.5% 13 | |
| 1916,31.1% 525,"68.2% 1,151",0.7% 11 | |
| 1912,25.7% 396,"65.3% 1,006",9.0% 139 | |