47% (1991)

47% (1988)

51% (1984)

47% (1982)

100% (1989)

40% (1988)

70% (1986)

52% (1987)

50% (1979)

42% (1987)

41% (1986)

54% (1987)

65% (1987)

62% (1987)

47% (1985)

30% (1987)

62% (1983)

56% (1988)

42% (1986)

60% (1980)