70% (1985)

68% (1968)

50% (1987)

57% (1972)

80% (1984)

65% (1980)

70% (1978)

90% (1987)

71% (1983)

95% (1984)

41% (1977)

77% (1989)

0% (1976)

63% (1977)

60% (1966)

55% (1979)

70% (1984)

82% (1988)

55% (1988)

80% (1967)