50% (2005)

82% (1989)

58% (1984)

76% (1971)

74% (1977)

73% (1969)

82% (1977)

60% (1986)

67% (1986)

80% (1978)

60% (1984)

68% (2003)

0% (1981)

70% (1971)

0% (1979)

61% (1983)

50% (1983)

0% (1959)

70% (1977)

60% (1977)