68% (1998)

83% (1995)

64% (1994)

26% (1993)

69% (1993)

65% (1996)

53% (1992)

57% (1996)

63% (2003)

57% (1993)

55% (1991)

66% (1994)

70% (1990)

57% (1993)

55% (1992)

59% (1997)

0% (1992)

68% (1993)

59% (1990)

70% (1991)