Year % of adults 2000 29.446673081304 2005 28.2023088463345 2010 27.0754103896717 2011 26.900592174273 2012 26.7235595706992 2013 26.56758500146 2014 26.3258460840262 2015 26.1481560965388 2016 25.9604861148815