56% (1994)

73% (2001)

63% (1992)

75% (1996)

54% (1996)

67% (1992)

57% (1997)

70% (1995)

72% (2002)

60% (1994)

46% (1998)

65% (1997)

76% (1994)

57% (1997)

55% (1998)

52% (1997)

45% (1997)

62% (1993)

68% (1998)

54% (1998)