70% (1984)

63% (1960)

63% (1978)

50% (1979)

56% (1969)

60% (1991)

50% (1961)

58% (1984)

60% (1965)

65% (1972)

68% (1985)

45% (1976)

54% (1956)

58% (1950)

41% (1972)

41% (1985)

48% (1950)

68% (1979)

0% (1981)

33% (1977)