62% (1980)

59% (2002)

57% (1967)

70% (1970)

63% (1966)

0% (1986)

62% (1962)

58% (1971)

53% (1971)

59% (1961)

0% (1988)

0% (1990)

63% (1973)

0% (1952)

0% (1976)

57% (1967)

50% (1953)

50% (1964)

50% (1965)

49% (1971)