69% (2007)

57% (2008)

55% (2005)

71% (2004)

63% (1999)

63% (2004)

55% (2007)

63% (2003)

62% (2009)

80% (2002)

70% (2013)

69% (2010)

50% (2009)

59% (2009)

49% (2000)

70% (2006)

65% (2005)

73% (2009)

60% (1999)

61% (2011)