73% (1992)

71% (1991)

65% (2001)

60% (1991)

73% (1993)

60% (2004)

65% (1994)

74% (1996)

60% (2001)

72% (1994)

73% (2004)

63% (2000)

60% (1994)

70% (1996)

66% (2000)

44% (1994)

62% (1994)

57% (1994)

50% (1993)

59% (1996)