52% (1969)

62% (1980)

30% (1956)

62% (1963)

0% (1995)

57% (1966)

50% (1963)

60% (1972)

70% (1976)

63% (1961)

57% (1984)

54% (1983)

58% (1972)

50% (1977)

68% (1988)

65% (1991)

0% (1980)

50% (1998)

52% (1962)

60% (1987)