60% (1962)

50% (1965)

0% (1986)

48% (1966)

68% (1966)

63% (1988)

53% (1981)

66% (1961)

59% (1974)

65% (1962)

62% (1975)

58% (1990)

65% (1963)

50% (1982)

0% (1966)

71% (1965)

67% (1967)

50% (1966)

64% (1968)

36% (1965)