Year	% (national estimate)
1996	74.69
1997	76.32
1998	76.92
2000	78.432
2001	81.264
2002	77.56
2003	77.51
2004	79.014
2005	79.831
2006	81.173
2007	79.984
2008	79.051
2009	76.035
2010	75.305
2011	74.984
2012	75.274
2013	74.896
2014	75.861
2015	77.637
2016	77.51
2017	78.192
2018	76.966
2019	75.801
2020	68.301
2021	74.566
2022	74.423
2023	75.059