61% (1972)

60% (1974)

71% (1971)

58% (1976)

75% (1954)

22% (1976)

58% (1976)

43% (1953)

70% (1974)

68% (1954)

60% (1958)

52% (1972)

54% (1971)

45% (1971)

60% (1967)

55% (1977)

58% (1976)

50% (1953)

60% (1954)

60% (1957)