46% (1980)

77% (1987)

0% (1975)

83% (1984)

77% (1983)

80% (1981)

73% (1969)

80% (1980)

80% (1974)

58% (1991)

90% (1988)

60% (1966)

90% (1982)

80% (1983)

53% (1977)

75% (1989)

95% (1984)

80% (1991)

64% (1983)

75% (1980)