56% (1972)

71% (1975)

72% (1960)

76% (1971)

78% (1977)

80% (1976)

78% (1967)

62% (1955)

73% (1967)

54% (1966)

73% (1971)

44% (1956)

55% (1956)

59% (1955)

0% (1963)

61% (1962)

71% (1980)

55% (1957)

45% (1989)

70% (1976)