0% (1990)

44% (1988)

43% (1988)

61% (1988)

44% (1987)

58% (1989)

33% (1988)

73% (1989)

38% (1988)

63% (1988)

39% (1988)

54% (1986)

0% (1988)

60% (1990)

48% (1987)

54% (1988)

50% (1989)

20% (1991)

69% (1990)

51% (1988)