80% (1979)

65% (1982)

78% (1989)

82% (1986)

50% (1989)

77% (1982)

80% (1982)

62% (1982)

67% (1981)

67% (1974)

0% (1985)

66% (1978)

63% (1973)

60% (1976)

60% (1979)

63% (1986)

64% (1980)

67% (1976)

70% (1979)

67% (1977)