57% (2008)

69% (2007)

56% (2005)

71% (2004)

60% (1999)

62% (2009)

62% (2003)

72% (2009)

65% (2005)

50% (2009)

49% (2000)

58% (2009)

63% (2004)

68% (2012)

69% (2010)

70% (2006)

60% (2007)

59% (2005)

62% (2011)

50% (1998)