Year	% (national estimate)
1996	78.924
1997	73.599
1998	72.99
1999	80.401
2000	76.422
2001	81.826
2003	79.688
2004	78.95
2007	80.205
2008	78.288
2009	81.541
2010	84.098
2011	84.945
2012	66.953
2013	79.868
2014	79.737
2015	79.29
2016	81.149
2017	81.294
2019	75.659
2020	82.097
2021	79.195