| Year |
Republicans |
Democrats |
Others |
Total |
| 1956 |
2,010 |
12,407 |
95 |
14,512 |
| 1960 |
N/A |
N/A |
N/A |
17,882 |
| 1962 |
3,360 |
13,264 |
N/A |
16,624 |
| 1963 |
4,052 |
15,356 |
183 |
19,591 |
| 1964 |
4,911 |
18,785 |
343 |
24,039 |
| 1965 |
5,401 |
19,143 |
296 |
24,840 |
| 1966 |
6,065 |
19,720 |
287 |
26,072 |
| 1967 |
6,424 |
19,658 |
289 |
26,371 |
| 1968 |
9,584 |
22,131 |
673 |
32,388 |
| 1969 |
10,441 |
23,455 |
693 |
34,589 |
| 1970 |
12,160 |
21,527 |
793 |
34,480 |
| 1971 |
14,549 |
24,766 |
1,035 |
40,350 |
| 1972 |
21,208 |
30,688 |
2,056 |
53,952 |
| 1973 |
24,353 |
34,259 |
2,748 |
61,360 |
| 1974 |
27,793 |
39,347 |
3,895 |
71,035 |
| 1975 |
27,232 |
39,196 |
4,196 |
70,624 |
| 1976 |
31,507 |
48,023 |
5,040 |
84,570 |
| 1977 |
33,002 |
51,380 |
5,369 |
89,751 |
| 1978 |
35,382 |
55,613 |
5,926 |
96,921 |
| 1979 |
35,634 |
54,770 |
6,002 |
96,406 |
| 1980 |
43,024 |
64,389 |
7,534 |
114,947 |
| 1981 |
44,217 |
63,564 |
7,557 |
115,338 |
| 1982 |
48,327 |
69,274 |
8,257 |
125,858 |
| 1983 |
46,932 |
66,120 |
7,856 |
120,908 |
|
| Year |
Republicans |
Democrats |
Others |
Total |
| 1984 |
55,782 |
75,353 |
9,286 |
140,421 |
| 1985 |
56,463 |
73,544 |
9,123 |
139,130 |
| 1986 |
59,755 |
76,006 |
9,679 |
145,440 |
| 1987 |
57,986 |
70,456 |
9,164 |
137,606 |
| 1988 |
67,735 |
78,593 |
11,093 |
157,421 |
| 1989 |
66,795 |
75,028 |
11,175 |
152,998 |
| 1990 |
69,361 |
77,190 |
11,778 |
158,329 |
| 1991 |
65,516 |
71,613 |
12,160 |
149,289 |
| 1992 |
74,463 |
81,380 |
15,761 |
171,604 |
| 1993 |
71,314 |
77,686 |
15,365 |
164,365 |
| 1994 |
76,078 |
79,894 |
16,464 |
172,436 |
| 1995 |
84,410 |
86,129 |
23,994 |
194,533 |
| 1996 |
86,728 |
87,290 |
29,393 |
203,411 |
| 1997 |
87,427 |
88,196 |
33,128 |
208,751 |
| 1998 |
88,016 |
88,157 |
36,530 |
212,703 |
| 1999 |
85,275 |
85,127 |
37,637 |
208,039 |
| 2000 |
91,172 |
89,742 |
43,401 |
224,315 |
| 2001 |
90,056 |
87,789 |
44,210 |
222,055 |
| 2002 |
91,483 |
88,308 |
47,262 |
227,053 |
| 2003 |
97,333 |
92,211 |
52,531 |
242,075 |
| 2004 |
108,174 |
100,332 |
61,136 |
269,642 |
| 2005 |
108,159 |
98,464 |
61,173 |
267,796 |
| 2006 |
107,456 |
97,642 |
62,069 |
267,167 |
| 2007 |
105,217 |
96,665 |
62,004 |
263,886 |
| 2008 |
116,214 |
111,428 |
71,167 |
298,809 |
|