Year % of adults 2000 55.5357516895506 2005 52.9756192585385 2010 50.9744470671785 2011 50.3096671480122 2012 50.2500658923132 2013 49.8801733976699 2014 49.5806659651869 2015 49.2406445797199 2016 48.9895731515206