Year	% (national estimate)
2002	55.928
2004	61.2
2005	55.257
2007	51.539
2008	53.757
2009	56.85
2010	55.827
2011	58.579
2012	55.611
2013	50.716
2014	50.735
2015	53.084
2016	54.402
2017	56.917
2018	58.908
2019	60.063