57% (1947)

50% (1955)

57% (1967)

58% (1982)

48% (1983)

63% (1981)

70% (1972)

70% (1965)

50% (1953)

63% (1971)

0% (1976)

50% (1998)

40% (1979)

74% (1994)

72% (1972)

62% (1958)

57% (1970)

50% (1983)

40% (1977)

60% (1970)