50% (1977)

68% (1980)

71% (1970)

68% (1967)

63% (1966)

57% (1981)

58% (1965)

58% (1979)

67% (1963)

70% (1963)

48% (1982)

65% (1981)

66% (1941)

26% (1983)

48% (1956)

64% (1946)

53% (1961)

50% (1940)

59% (1966)

52% (1941)