50% (1953)

55% (1962)

74% (1962)

50% (1964)

57% (1948)

72% (1955)

50% (1965)

50% (1980)

50% (1962)

57% (1967)

63% (1966)

0% (1968)

0% (1990)

50% (1969)

58% (1960)

50% (1988)

10% (1997)

0% (1961)

50% (1961)

65% (1989)