57% (1970)

80% (1984)

62% (1978)

56% (1989)

57% (1969)

44% (1962)

42% (1958)

58% (1960)

40% (1977)

40% (1980)

55% (1968)

64% (1970)

27% (1979)

53% (1991)

53% (1943)

69% (1944)

58% (1990)

49% (1955)

64% (1947)

59% (1974)