2022	Democratic	692,691	40.7%
	Republican	988,501	58.0%
	Other	22,000	1.3%

2018	Democratic	784,182	45.9%
	Republican	921,342	54.0%
	Other	2,045	0.1%

2014	Democratic	516,166	41.4%
	Republican	696,645	55.9%
	Other	33,490	2.7%

2010	Democratic	630,534	46.9%
	Republican	690,525	51.4%
	Other	23,139	1.7%

2006	Democratic	489,076	44.8%
	Republican	601,868	55.1%
	Other	1,008	0.1%

2002	Democratic	521,140	47.0%
	Republican	585,422	52.8%
	Other	1,163	0.1%

1998	Democratic	570,070	53.2%
	Republican	484,088	45.2%
	Other	16,711	1.6%

1994	Democratic	447,002	47.9%
	Republican	470,756	50.4%
	Other	16,092	1.7%

1990	Democratic	212,048	27.9%
	Republican	528,831	69.5%
	Other	20,140	2.6%

1986	Democratic	361,328	47.9%
	Republican	384,565	51.0%
	Other	7,856	1.0%

1982	Democratic	468,787	69.8%
	Republican	202,806	30.2%
	Other	184	0.0%

1978	Democratic	384,898	61.3%
	Republican	236,946	37.7%
	Other	6,039	1.0%

1974	Democratic	248,861	47.5%
	Republican	266,338	50.9%
	Other	8,313	1.6%

1970	Democratic	251,151	51.7%
	Republican	221,236	45.6%
	Other	13,073	2.7%