82% (1989)

75% (1977)

77% (1971)

50% (1976)

50% (2005)

56% (1978)

64% (1983)

78% (1978)

72% (1969)

70% (1971)

75% (1970)

83% (1977)

58% (1984)

67% (1986)

62% (1988)

73% (1979)

70% (1977)

72% (1982)

80% (1994)

0% (1970)