63% (1971)

65% (1955)

50% (1998)

74% (1994)

62% (1963)

58% (1960)

54% (1973)

40% (1977)

52% (1979)

67% (1993)

55% (1981)

43% (1985)

58% (1993)

60% (1972)

65% (1970)

60% (1962)

0% (1999)

42% (1979)

76% (1985)

50% (1979)