61% (1983)

51% (1980)

47% (1978)

63% (1983)

69% (1980)

43% (1979)

50% (1978)

55% (1986)

65% (1976)

20% (1978)

56% (1977)

50% (1979)

70% (1984)

50% (1981)

0% (1978)

49% (1974)

30% (1981)

0% (1978)

58% (1976)

30% (1977)