70% (1974)

60% (1973)

58% (1964)

50% (1974)

50% (1963)

64% (1964)

54% (1974)

63% (1972)

67% (1967)

10% (1964)

48% (1967)

61% (1962)

39% (1975)

45% (1972)

62% (1973)

10% (1976)

60% (1973)

20% (1974)