69% (2007)

57% (2008)

57% (2005)

63% (2003)

62% (2009)

59% (2009)

63% (2004)

69% (2010)

63% (1999)

70% (2013)

55% (2007)

60% (1999)

65% (2005)

50% (1999)

70% (2006)

71% (2004)

80% (2002)

73% (2009)

68% (2012)

50% (2009)