80% (1999)

81% (1993)

77% (1993)

58% (1995)

53% (1996)

65% (1997)

72% (1996)

72% (1995)

68% (1998)

62% (1990)

57% (1994)

44% (1993)

60% (1997)

69% (1992)

57% (1993)

63% (1996)

70% (1995)

54% (1996)

70% (1995)

62% (1998)