72% (1985)

69% (1984)

56% (1991)

57% (1991)

67% (1992)

55% (1985)

64% (1986)

60% (1985)

62% (1992)

56% (1988)

38% (1995)

61% (1990)

52% (1990)

58% (1990)

60% (1991)

20% (1985)

65% (1988)

61% (1993)

0% (1991)

0% (1996)