59% (2008)

69% (2007)

57% (2005)

72% (2004)

62% (1999)

73% (2009)

49% (2000)

64% (2004)

67% (2002)

65% (2003)

70% (2013)

65% (2005)

59% (2009)

50% (2009)

62% (2009)

75% (2002)

70% (2006)

60% (1999)

69% (2010)

68% (2012)