69% (1988)

71% (1986)

64% (1984)

72% (1979)

65% (1988)

63% (1973)

72% (1973)

62% (1976)

46% (1985)

64% (1987)

38% (1973)

70% (1983)

72% (1980)

64% (1987)

76% (1986)

0% (2006)

0% (1987)

75% (1978)

31% (1985)

50% (1962)