Year	% (national estimate)
2008	15.415580303469152
2009	14.221655858551392
2010	14.575766109912575
2012	15.396385206221376
2014	13.762299882769
2015	15.531821909772141
2016	15.487366232849755
2017	14.277051391252813
2021	12.075615036329125