Year	% (national estimate)
2008	16.798682912049255
2009	15.960470754225891
2010	16.221889694637824
2012	16.71723153278427
2014	15.094500160670291
2015	17.522958815616228
2016	17.278708847875034
2017	16.585018930254225
2021	15.92263162548859