1948
2.08%
1952
4.54%
1956
No Record
1960
12.24%
1964
18.33%
1968
22.72%
1972
23.25%
1976
23.53%
1980
No Record
1984
28.75%
1988
36.12%
1992
29.19%
1996
34.77%
2000
35.38%
2004
40.99%
2008
36.78%
2012
43.59%
2016
44.87%
