65% (1994)

62% (1996)

62% (1997)

68% (1998)

59% (1993)

35% (1996)

60% (1991)

55% (1994)

50% (1994)

80% (1995)

50% (1997)

44% (1993)

57% (1998)

47% (1998)

50% (1998)

50% (1996)

0% (1998)

63% (1993)

100% (1995)

10% (1997)