Year % of adults 2000 33.1630986658906 2005 28.1807034595062 2010 24.0638807780861 2011 23.3548210692235 2012 22.5694262770282 2013 21.966219337389 2014 21.3172544933239 2015 20.6615658126609 2016 20.0862352379367