61% (1983)

51% (1980)

69% (1980)

47% (1978)

50% (1979)

55% (1986)

30% (1977)

0% (1978)

43% (1979)

65% (1976)

65% (1983)

56% (1977)

49% (1974)

50% (1978)

58% (1976)

0% (1979)

30% (1981)

70% (1984)

0% (1978)

50% (1981)