63% (2012)

67% (2010)

75% (2011)

60% (2012)

73% (2010)

58% (2012)

63% (2009)

60% (2010)

58% (2009)

71% (2013)

55% (2009)

67% (2011)

46% (2011)

59% (2008)

57% (2011)

69% (2010)

66% (2009)

64% (2010)

67% (2009)

45% (1999)