72% (1985)

70% (1984)

52% (1990)

57% (1991)

63% (1991)

55% (1985)

56% (1991)

67% (1992)

61% (1990)

56% (1988)

38% (1995)

64% (1986)

62% (1992)

58% (1990)

60% (1985)

65% (1988)

27% (1995)

0% (1991)

44% (1992)

0% (1996)