Year	% (national estimate)
2000	70.43842697597928
2001	72.89434203244731
2002	71.88812481262148
2003	71.48096820464616
2004	70.88494548975851
2005	70.28652757736297
2006	70.12932671304802
2007	70.19586756267718
2008	69.46666300291793
2009	69.43163648951375
2010	68.22732582039924
2011	68.29940573771637
2012	68.14421573249075
2013	68.01573339026928
2014	67.93386310352044
2015	67.66921077427403
2016	67.5433869040911
2017	67.13041886473307
2018	66.95962075260881
2019	66.87174929779336