59% (1980)

0% (1967)

39% (1974)

63% (1974)

65% (1971)

0% (1973)

58% (1973)

50% (1972)

80% (1985)

75% (1981)

68% (1972)

60% (1972)

38% (1985)

45% (1980)

62% (1978)

60% (1985)

56% (1976)

50% (1986)

20% (1979)

10% (1972)