60% (1984)

86% (1979)

60% (1969)

82% (1985)

60% (1980)

90% (1984)

41% (1977)

80% (1980)

50% (1974)

65% (1976)

69% (1984)

70% (1980)

0% (1975)

57% (1972)

44% (1980)

70% (1978)

64% (1983)

58% (1991)

70% (1982)

70% (1971)