70% (1984)

73% (1985)

59% (1991)

25% (1985)

62% (1992)

55% (1985)

61% (1990)

66% (1992)

60% (1985)

58% (1990)

63% (1991)

64% (1986)

52% (1990)

61% (1993)

56% (1988)

60% (1991)

44% (1992)

56% (1991)

39% (1995)

0% (1988)