Year % of adults 2000 17.8702549585609 2005 14.0501706153986 2010 11.0510479905053 2011 10.6033102112401 2012 10.1109030551444 2013 9.6925046596031 2014 9.25900238197937 2015 8.80380493192685 2016 8.44779144077396