90% (1982)

80% (1980)

90% (1983)

75% (1980)

75% (1989)

90% (1988)

65% (1980)

0% (1976)

75% (1989)

95% (1984)

52% (1986)

80% (1973)

60% (1980)

80% (1972)

55% (1979)

90% (1981)

60% (1989)

73% (1977)

50% (1982)

80% (1980)