69% (1965)

70% (1987)

76% (1977)

69% (1976)

42% (1968)

55% (1977)

68% (1969)

68% (1985)

71% (1983)

54% (1956)

61% (1988)

61% (1968)

0% (1929)

62% (1982)

61% (1970)

50% (1968)

0% (1983)

55% (1929)

58% (1968)

32% (1960)