50% (1987)

53% (1982)

0% (1990)

62% (1985)

0% (1989)

50% (1987)

0% (1985)

60% (1987)

46% (1986)

44% (1988)

0% (1987)

34% (1979)

42% (1986)

55% (1987)

40% (1985)

0% (1979)

30% (1987)

41% (1986)

42% (1988)

53% (1983)