52% (1957)

44% (1985)

59% (2002)

67% (1978)

60% (1963)

62% (1962)

0% (1976)

0% (1974)

58% (1971)

0% (1990)

60% (1964)

46% (1993)

0% (1952)

0% (2000)

80% (1990)

0% (1979)

60% (1961)

50% (1986)

50% (1956)

63% (1967)