80% (1966)

66% (1995)

59% (1979)

76% (1958)

69% (1951)

72% (1951)

69% (1965)

66% (1976)

68% (1965)

58% (1966)

48% (1970)

61% (1969)

71% (1997)

66% (1980)

68% (1954)

60% (1979)

47% (1995)

56% (1972)

61% (1994)

58% (1967)