Year % of adults 2000 60.668715252321 2005 56.0518702979275 2010 51.8961237939751 2011 51.1561772278549 2012 50.3519849742863 2013 49.6260235247865 2014 48.838954048728 2015 48.100221685686 2016 47.3553124709126