76% (2010)

65% (2013)

56% (2011)

54% (2011)

57% (2015)

64% (2017)

61% (2007)

61% (2009)

55% (2012)

56% (2011)

51% (2000)

55% (2001)

66% (2010)

65% (2006)

63% (2010)

39% (1999)

56% (2013)

57% (2012)

59% (2008)

55% (2012)