82% (1995)

68% (1998)

69% (1995)

64% (1994)

69% (1993)

63% (2003)

58% (1996)

65% (1996)

57% (1993)

56% (1992)

59% (1997)

68% (1994)

62% (1998)

37% (1991)

25% (1992)

57% (1990)

96% (1996)

30% (1993)

49% (1990)

67% (1995)