Year	% (national estimate)
2008	15.460264407330895
2009	14.250711914147873
2010	14.616012839442515
2012	15.443486608096748
2014	13.781307652222116
2015	15.585383831874273
2016	15.547312795942208
2017	14.336212467803888
2021	12.109563692632257