64% (2009)

75% (1997)

74% (1992)

74% (1993)

77% (1997)

69% (1994)

63% (1993)

76% (1996)

71% (1991)

65% (1993)

71% (1997)

77% (1998)

68% (1995)

77% (1995)

57% (2004)

64% (2010)

74% (1994)

63% (1996)

53% (1997)

49% (1994)