72% (1995)

76% (1973)

77% (1983)

72% (2002)

76% (1976)

69% (1966)

63% (1981)

69% (1973)

65% (1967)

67% (1998)

60% (1995)

63% (1979)

62% (1974)

52% (1973)

67% (1977)

58% (1982)

61% (1970)

67% (1984)

74% (1976)

55% (1993)