2020	Democratic	474,483	51.7%
	Republican	418,483	45.6%
	Other	24,271	2.6%

2018	Democratic	376,998	54.1%
	Republican	212,813	30.5%
	Other	107,201	15.4%

2014	Democratic	286,409	55.6%
	Republican	229,097	44.4%

2012	Democratic	395,717	51.0%
	Republican	351,259	45.3%
	Other	28,816	3.7%

2008	Democratic	505,128	61.3%
	Republican	318,522	38.7%

2006	Democratic	394,365	70.6%
	Republican	163,826	29.3%
	Other	359	0.1%

2002	Democratic	168,866	35.0%
	Republican	314,193	65.0%

2000	Democratic	363,744	61.7%
	Republican	225,517	38.3%
	Other	265	0.0%

1996	Democratic	164,356	29.8%
	Republican	357,171	64.7%
	Other	30,294	5.5%

1994	Democratic	249,989	54.0%
	Republican	213,025	46.0%
	Other	182	0.0%

1990	Democratic	110,033	27.0%
	Republican	296,712	72.9%
	Other	193	0.0%

1988	Democratic	321,983	63.3%
	Republican	186,579	36.7%
	Other	36	0.0%

1984	Democratic	141,253	28.1%
	Republican	361,371	71.9%
	Other	9	0.0%

1982	Democratic	217,682	53.8%
	Republican	187,128	46.2%

1978	Democratic	160,045	46.6%
	Republican	183,442	53.4%

1976	Democratic	176,382	42.7%
	Republican	234,681	56.8%
	Other	1,993	0.5%

1972	Democratic	173,815	46.0%
	Republican	204,253	54.0%

1970	Democratic	151,486	52.3%
	Republican	135,004	46.6%
	Other	3,382	1.2%

1966	Democratic	137,205	53.1%
	Republican	120,988	46.9%
	Other	10	0.0%

1964	Democratic	178,209	54.7%
	Republican	147,562	45.3%
	Other	3	0.0%