66% (1980)

64% (1982)

72% (1993)

70% (1976)

76% (1966)

63% (1980)

74% (1991)

65% (1985)

67% (1967)

47% (2008)

71% (1981)

62% (1995)

73% (1967)

73% (1973)

68% (1986)

54% (2008)

71% (1982)

60% (1970)

60% (1979)

69% (1980)