72% (1969)

62% (1969)

68% (1972)

59% (1969)

60% (1976)

70% (1955)

60% (1973)

55% (1970)

55% (1970)

46% (1971)

68% (1975)

50% (1971)

50% (1978)

70% (1972)

58% (1956)

50% (1953)