Year	% (national estimate)
2002	50.16
2007	30.153
2008	33.069
2009	34.629
2010	33.635
2011	44.102
2012	36.214
2013	27.569
2014	28.958
2015	31.299
2016	31.648
2017	31.615
2018	35.686
2019	36.592