South Dakota General Election Voter Registration by Party

	Republican	Democrat	Libertarian	Reform	Constitution	Other		Republican	Democrat	Libertarian	Reform	Constitution	Other
1970	182502	134123	0			34691	1970	51.95%	38.18%	0.00%			9.87%
1972	195737	158816	0			37703	1972	49.90%	40.49%	0.00%			9.61%
1974	193234	170937	0			37480	1974	48.11%	42.56%	0.00%			9.33%
1976	196841	190572	0			38119	1976	46.26%	44.78%	0.00%			8.96%
1978	191766	193345	0			35707	1978	45.57%	45.95%	0.00%			8.49%
1980	206411	202052	0			39045	1980	46.12%	45.15%	0.00%			8.72%
1982	200422	189708	0			36381	1982	46.99%	44.48%	0.00%			8.53%
1984	211177	192274	0			39339	1984	47.69%	43.42%	0.00%			8.88%
1986	208935	184720	0			34442	1986	48.81%	43.15%	0.00%			8.05%
1988	216510	188552	0			35239	1988	49.17%	42.82%	0.00%			8.00%
1990	207036	180181	0			33134	1990	49.25%	42.86%	0.00%			7.88%
1992	215285	189935	346			42726	1992	48.02%	42.37%	0.08%			9.53%
1994	212544	176881	469			41979	1994	49.21%	40.96%	0.11%			9.72%
1996	223932	184262	656			51121	1996	48.68%	40.06%	0.14%			11.11%
1998	219624	179195	924			53158	1998	48.49%	39.57%	0.20%			11.74%
2000	226906	181129	1074	130		61913	2000	48.16%	38.44%	0.23%	0.03%		13.14%
2002	228200	183343	1148	122		63171	2002	47.94%	38.52%	0.24%	0.03%		13.27%
2004	238580	191523	1091		101	70966	2004	47.50%	38.13%	0.22%		0.02%	14.30%
2006	240101	190905	1168		350	74608	2006	47.34%	37.64%	0.23%		0.07%	14.71%