2022	Democratic	0	0.0%
	Republican	0	0.0%

2018	Democratic	458,142	43.9%
	Republican	549,416	52.6%
	Other	36,882	3.5%

2014	Democratic	350,692	40.8%
	Republican	508,926	59.2%

2010	Democratic	308,641	37.2%
	Republican	489,640	59.0%
	Other	31,232	3.8%

2006	Democratic	264,598	32.0%
	Republican	526,522	63.7%
	Other	35,355	4.3%

2002	Democratic	257,698	31.9%
	Republican	528,626	65.4%
	Other	21,373	2.6%

1998	Democratic	195,747	27.4%
	Republican	456,391	63.8%
	Other	62,886	8.8%

1994	Democratic	335,646	42.3%
	Republican	423,953	53.4%
	Other	33,647	4.2%

1990	Democratic	285,107	38.9%
	Republican	447,491	61.1%

1986	Democratic	371,479	46.5%
	Republican	427,460	53.5%

1982	Democratic	257,279	35.5%
	Republican	435,429	60.0%
	Other	32,877	4.5%

1978	Democratic	292,935	43.2%
	Republican	360,993	53.2%
	Other	24,498	3.6%

1974	Democratic	256,459	35.0%
	Republican	452,543	61.8%
	Other	22,869	3.1%

1972	Democratic	357,291	42.2%
	Republican	468,483	55.4%
	Other	20,174	2.4%

1970	Democratic	280,304	41.1%
	Republican	371,771	54.6%
	Other	29,415	4.3%

1968	Democratic	295,101	37.8%
	Republican	468,254	60.0%
	Other	17,392	2.2%

1966	Democratic	269,961	42.3%
	Republican	355,594	55.7%
	Other	12,818	2.0%

1964	Democratic	332,915	42.2%
	Republican	440,933	55.9%
	Other	15,529	2.0%

1962	Democratic	252,880	41.9%
	Republican	339,571	56.3%
	Other	10,382	1.7%

1960	Democratic	362,931	42.2%
	Republican	479,966	55.8%
	Other	17,473	2.0%

1958	Democratic	312,944	46.8%
	Republican	329,462	49.3%
	Other	25,607	3.8%

1956	Democratic	350,649	43.9%
	Republican	430,138	53.9%
	Other	17,517	2.2%

1954	Democratic	247,149	42.0%
	Republican	328,905	55.9%
	Other	12,520	2.1%

1952	Democratic	298,315	36.7%
	Republican	493,095	60.7%
	Other	20,992	2.6%

1950	Democratic	273,840	46.3%
	Republican	301,738	51.1%
	Other	15,402	2.6%

1914	Democratic	169,530	35.3%
	Republican	189,753	39.5%
	Independent	70,512	14.7%
	Other	50,605	10.5%

1912	Democratic	150,552	43.4%
	Republican	170,129	49.1%
	Independent	25,973	7.5%
	Other	94	0.0%

1910	Democratic	127,445	40.8%
	Republican	165,292	53.0%
	Independent	16,377	5.2%
	Other	2,883	0.9%