74% (1961)

63% (1966)

50% (1956)

57% (1947)

58% (1990)

70% (1973)

50% (1962)

68% (1988)

50% (1969)

60% (1959)

50% (1965)

40% (1992)

0% (1961)

50% (1978)

45% (1966)

50% (1989)

60% (1982)

72% (1955)

60% (1951)

65% (1967)