52% (1982)

60% (2013)

45% (1970)

64% (1980)

67% (1955)

61% (1946)

57% (1979)

59% (1958)

55% (1944)

58% (1949)

56% (1941)

49% (1990)

70% (1950)

62% (1965)

60% (1976)

69% (1943)

66% (1941)

59% (1951)

68% (1956)

56% (1976)