90% (1988)

75% (1989)

70% (1978)

70% (1985)

70% (1978)

55% (1979)

67% (1982)

57% (1972)

70% (1990)

90% (1969)

0% (1976)

64% (1983)

58% (1977)

76% (1980)

82% (1988)

73% (1977)

80% (1991)

80% (1982)

80% (1972)

80% (1984)