Year	% (national estimate)
1998	49.9
1999	51.15
2000	54
2001	52.05
2002	49.86
2003	50.92
2004	50.16
2005	48.82
2006	47.4
2007	48.1
2008	44.9
2009	44.225
2010	46.01
2011	46.467
2012	46.865
2013	47.319
2014	49.045
2015	50.747
2016	50.574
2017	50.787
2018	49.335
2019	48.993
2020	49.386