78% (1980)

72% (1994)

48% (1980)

46% (1977)

49% (1993)

52% (1958)

80% (1978)

50% (1972)

58% (1960)

56% (1973)

66% (1979)

58% (1974)

53% (1955)

0% (1965)

0% (1981)

63% (1977)

71% (1979)

80% (1971)

0% (1966)

68% (1960)