78% (1974)

70% (1978)

45% (1984)

70% (1977)

100% (1984)

80% (1976)

77% (1984)

57% (1979)

67% (1978)

67% (1982)

63% (1980)

60% (1983)

62% (1984)

63% (1973)

76% (1977)

58% (1975)

60% (1981)

57% (1979)

72% (1990)

80% (1982)