Year	% (national estimate)
1991	85.7
1992	86.51
1995	88.44
1998	88.44
1999	90.81
2001	87.52
2002	82
2003	79.9
2004	66.71
2005	80.252
2006	80.748
2007	79.921
2008	79.15
2009	80.031
2010	79.725
2011	78.545
2012	77.662
2013	79.726
2014	79.257
2015	79.653
2016	78.119
2017	81.357
2018	80.416
2019	80.141
2020	68.08
2021	71.695
2022	77.487
2023	73.735