48% (2009)

56% (2010)

56% (2011)

64% (2010)

58% (2010)

56% (2012)

59% (2010)

62% (2010)

60% (2009)

59% (2012)

51% (2010)

78% (2012)

54% (2013)

48% (2011)

45% (2010)

82% (2009)