76% (1971)

71% (1975)

72% (1960)

56% (1972)

78% (1977)

80% (1976)

61% (1955)

78% (1967)

73% (1967)

55% (1956)

54% (1966)

73% (1971)

44% (1956)

71% (1980)

59% (1955)

0% (1963)

61% (1962)

45% (1989)

70% (1976)

100% (1995)