68% (1998)

83% (1995)

64% (1994)

70% (1993)

65% (1996)

64% (2003)

57% (1996)

59% (1997)

55% (1992)

68% (1993)

65% (1994)

57% (1993)

61% (1998)

52% (1995)

96% (1996)

67% (1995)

90% (1990)

60% (1995)

26% (1993)

53% (1992)