43% (1989)

44% (1986)

44% (1990)

42% (1990)

37% (1990)

50% (1988)

59% (1989)

25% (1992)

57% (1991)

35% (1990)

43% (1987)

15% (1991)

35% (1993)

45% (1990)

74% (1991)

35% (1990)

47% (1990)

45% (1990)

50% (1992)