55% (2005)

53% (2008)

61% (2007)

65% (2010)

61% (2014)

57% (2012)

58% (2009)

53% (2008)

61% (2011)

47% (2008)

64% (2015)

53% (2012)

60% (2015)

59% (2006)

59% (2014)

55% (2002)

65% (2005)

64% (2016)

57% (2014)

62% (2011)