80% (1982)

86% (1979)

70% (1983)

60% (1980)

70% (1980)

80% (1967)

68% (1980)

28% (1977)

77% (1989)

55% (1988)

80% (1981)

80% (1975)

55% (1987)

70% (1982)

50% (1974)

85% (1984)

80% (1983)

80% (1977)

80% (1980)

70% (1971)