76% (1977)

70% (1976)

70% (1987)

62% (1958)

69% (1985)

59% (1987)

70% (1965)

62% (1988)

62% (1974)

42% (1968)

62% (1968)

69% (1969)

63% (1967)

0% (1988)

60% (1979)

32% (1960)

30% (1981)

68% (1954)

100% (1985)

58% (1973)