69% (2007)

58% (2008)

56% (2005)

71% (2004)

59% (2009)

69% (2010)

63% (1999)

73% (2009)

55% (2007)

60% (1999)

70% (2013)

63% (2004)

50% (2009)

63% (2003)

49% (2000)

59% (2005)

70% (2006)

62% (2009)

50% (1999)

60% (2002)