50% (2005)

82% (1989)

76% (1971)

75% (1977)

58% (1984)

70% (1977)

72% (1969)

0% (1981)

61% (1983)

0% (1959)

0% (1979)

70% (1971)

60% (1977)

83% (1977)

73% (1979)

78% (1978)

50% (1998)

52% (1980)

60% (1984)

65% (1968)