Year % of adults 2000 8.51116322151062 2005 6.17831998907671 2010 4.58272818547138 2011 4.29394500280319 2012 4.07820472552947 2013 3.84880869562797 2014 3.65030178994877 2015 3.44762850574505 2016 3.30181967938412