Year	% (national estimate)
2002	55.83
2007	37.007
2008	37.635
2009	39.909
2010	39.916
2011	51.655
2012	43.892
2013	36.517
2014	37.375
2015	39.153
2016	36.731
2017	37.492
2018	43.341
2019	43.211