70% (1984)

72% (1985)

59% (1991)

52% (1990)

62% (1992)

68% (1992)

60% (1985)

65% (1988)

63% (1991)

0% (1991)

55% (1985)

64% (1986)

56% (1991)

56% (1988)

38% (1995)

58% (1990)

0% (1996)

61% (1990)

25% (1985)

10% (1994)