50% (1977)

71% (1970)

68% (1967)

63% (1966)

57% (1981)

68% (1980)

65% (1981)

70% (1963)

58% (1979)

60% (1976)

60% (1978)

48% (1982)

50% (1940)

40% (1945)

58% (1965)

71% (1965)

47% (1959)

60% (1969)

26% (1983)

50% (1947)