94% (1984)

78% (1987)

100% (1988)

70% (1986)

83% (1973)

0% (1982)

74% (1987)

89% (1974)

88% (1986)

68% (1976)

83% (1974)

94% (1980)

83% (1975)

78% (1974)

100% (1977)

0% (1975)

0% (1983)

88% (1980)

85% (1971)

0% (1970)