73% (1995)

77% (1973)

77% (1983)

72% (2002)

76% (1976)

57% (1972)

64% (1981)

67% (1977)

65% (1967)

69% (1966)

60% (1995)

61% (1974)

69% (1973)

68% (1998)

58% (1982)

55% (1977)

61% (1970)

66% (1984)

0% (1973)

50% (1980)