64% (1974)

61% (1998)

71% (1976)

62% (1985)

73% (1964)

66% (2002)

65% (1975)

57% (1991)

58% (2004)

66% (1981)

65% (1953)

61% (1986)

55% (1966)

72% (1954)

64% (1981)

68% (1966)

66% (1965)

64% (1951)

51% (1994)

61% (1996)