78% (1980)

72% (1994)

46% (1977)

48% (1980)

70% (1979)

56% (1971)

52% (1958)

66% (1979)

56% (1973)

0% (1989)

0% (1962)

0% (1971)

0% (1985)

62% (1977)

68% (1960)

56% (1960)

62% (1974)

0% (1988)

64% (1976)

63% (1969)