69% (2011)

62% (2013)

45% (2013)

69% (2004)

67% (2013)

64% (2008)

57% (2012)

54% (2014)

68% (2016)

60% (2016)

52% (2014)

49% (2016)

45% (2015)

49% (2009)

59% (2015)

67% (2010)

61% (2003)

52% (2006)

59% (2015)

60% (2007)