42% (1983)

47% (1988)

55% (1985)

40% (1988)

0% (1989)

25% (1992)

46% (1989)

50% (1987)

44% (1979)

38% (1978)

65% (1987)

34% (1992)

37% (1979)

50% (1980)

63% (1987)

23% (1986)

40% (1984)

63% (1973)

47% (1970)

38% (1984)