59% (1976)

58% (1972)

68% (1954)

48% (1971)

32% (1968)

62% (1976)

52% (1967)

53% (1952)

30% (1970)

45% (1971)

63% (1997)

60% (1966)

65% (1969)

63% (1969)

57% (1972)

74% (1951)

58% (1982)

68% (1976)

63% (1979)

54% (1953)