2022	Democratic	0	0.0%
	Republican	0	0.0%

2018	Democratic	427,289	41.0%
	Republican	614,436	59.0%

2014	Democratic	281,105	33.2%
	Republican	564,766	66.8%

2010	Democratic	349,340	41.9%
	Republican	460,737	55.2%
	Other	24,627	3.0%

2006	Democratic	491,422	58.5%
	Republican	348,509	41.5%

2002	Democratic	408,410	49.7%
	Republican	412,697	50.3%

1998	Democratic	181,938	24.9%
	Republican	548,826	75.1%

1994	Democratic	289,609	36.1%
	Republican	513,496	63.9%

1990	Democratic	382,691	49.7%
	Republican	386,989	50.3%

1986	Democratic	390,251	47.2%
	Republican	436,621	52.8%

1982	Democratic	229,725	31.1%
	Republican	508,020	68.9%

1978	Democratic	328,010	45.0%
	Republican	389,398	53.4%
	Other	12,194	1.7%

1974	Democratic	398,206	52.0%
	Republican	367,730	48.0%

1972	Democratic	603,117	67.8%
	Republican	286,456	32.2%

1970	Democratic	363,121	51.1%
	Republican	339,111	47.7%
	Other	8,933	1.3%

1968	Democratic	308,097	39.3%
	Republican	476,173	60.7%

1966	Democratic	270,796	42.6%
	Republican	342,976	53.9%
	Other	22,193	3.5%

1964	Democratic	376,999	48.5%
	Republican	399,650	51.5%

1962	Democratic	251,293	42.1%
	Republican	344,898	57.9%
	Other	2	0.0%

1960	Democratic	425,144	49.4%
	Republican	435,785	50.6%

1958	Democratic	326,133	49.7%
	Republican	330,208	50.3%

1956	Democratic	356,492	45.1%
	Republican	434,543	54.9%

1954	Democratic	274,474	46.3%
	Republican	318,677	53.7%

1952	Democratic	338,860	42.0%
	Republican	467,637	58.0%

1950	Democratic	244,021	42.4%
	Republican	331,501	57.6%

1914	Democratic	178,814	37.6%
	Republican	194,140	40.9%
	Independent	73,539	15.5%
	Other	28,683	6.0%

1912	Democratic	153,453	44.0%
	Republican	169,708	48.6%
	Independent	25,891	7.4%

1910	Democratic	127,357	40.7%
	Republican	166,349	53.1%
	Independent	16,425	5.2%
	Other	2,889	0.9%