63% (2001)

78% (2004)

68% (2004)

68% (1999)

65% (2008)

74% (1998)

68% (2010)

63% (2009)

70% (2006)

69% (1992)

67% (2001)

67% (2010)

60% (1996)

71% (2001)

60% (1999)

69% (2006)

67% (1995)

59% (2006)

67% (2002)

39% (2006)