67% (2010)

70% (2012)

55% (2012)

64% (2008)

60% (2012)

60% (2007)

47% (2015)

49% (2009)

57% (2009)

50% (2008)

65% (2011)

62% (2010)

47% (2007)

62% (2008)

66% (2011)

65% (2008)

42% (2009)

58% (2011)

43% (2011)

57% (2008)