70% (1974)

66% (1971)

55% (1981)

63% (1966)

69% (1973)

75% (1961)

55% (1982)

57% (1982)

54% (1976)

70% (1958)

64% (1938)

56% (1977)

65% (1976)

69% (1943)

71% (1937)

54% (1979)

61% (1984)

58% (1980)

63% (1989)

49% (1975)