69% (2012)

67% (2010)

54% (2012)

47% (2015)

60% (2012)

64% (2008)

49% (2009)

56% (2009)

65% (2011)

65% (2011)

63% (2010)

58% (2008)

65% (2008)

50% (2008)

43% (2011)

57% (2008)

43% (2007)

58% (2012)

60% (2007)

62% (2008)