48% (1958)

70% (2000)

68% (1994)

78% (2014)

78% (1964)

70% (1975)

55% (2002)

77% (1967)

76% (1974)

66% (1968)

70% (2005)

61% (1977)

62% (1986)

78% (1998)

60% (1968)

57% (1959)

68% (1991)

50% (1960)

76% (1973)

65% (1992)