Year	% (national estimate)
2000	70.4386249345457
2001	72.89434203244731
2002	71.88812481262147
2003	71.48096820464615
2004	70.88494548975851
2005	70.28659318572937
2006	70.12932671304802
2007	70.19586756267718
2008	69.46666300291793
2009	69.43163648951376
2010	68.22732582039924
2011	68.29940573771636
2012	68.14421573249074
2013	68.01577013474767
2014	67.9339035096066
2015	67.66921077427402
2016	67.5433869040911
2017	67.13041886473309
2018	66.95962075260883
2019	66.87174929779336