Year	% (national estimate)
1993	82.56
1994	85.82
1996	70.1
1998	82.873
1999	80.335
2001	79.601
2002	79.167
2003	79.05
2004	81.482
2005	81.705
2006	79.777
2007	81.087
2008	82.073
2009	80.243
2010	79.415
2011	78.841
2012	80.173
2013	79.092
2014	78.818
2015	77.986
2016	80.015
2017	80.132
2018	79.965
2019	80.175
2020	78.544
2021	79.427
2022	77.715
2023	78.979