Year % of adults 2000 25.4375643923027 2005 23.8820218293059 2010 22.4626049326917 2011 22.1908000551318 2012 21.9649258389179 2013 21.6997577879677 2014 21.5002503328202 2015 21.2546076740237 2016 21.0521051983589