51% (1930)

40% (1963)

60% (1955)

62% (1991)

50% (1964)

73% (1965)

70% (1968)

0% (1974)

50% (1983)

60% (1981)

65% (1987)

68% (1982)

60% (1962)

57% (1945)

70% (1932)

40% (1975)

55% (1986)

50% (1981)

60% (1965)

40% (1979)