Year	% (national estimate)
1986	68.7890388877695
1987	69.86992470666175
1988	71.18105271454282
1989	70.7891889003193
1990	72.6233081290531
1991	73.44553276692461
1992	73.74220061985447
1993	73.67227315580212
1994	74.73768511354535
1995	75.29970198362933
1996	76.75114774344242
1997	76.78230212342224
1998	77.41356816699282
1999	78.01958354328671
2000	78.00413144519041
2001	78.93702920934265
2002	79.13295495713079
2003	80.40132872347637
2004	80.2569230975744
2005	81.01324874043665
2006	81.12615653416987
2007	81.72072894747289
2008	82.53155465705507
2009	83.21433833871377
2010	83.35395207487292
2011	83.75494336081506
2012	84.7338992459012
2013	85.06154013723996
2014	85.29506740938079
2015	85.1880214421023
2016	85.55615872469447
2017	85.64370024704913
2018	86.2478354410453
2019	87.24775264511682
2020	86.40756107583611
2021	87.46163615197376
2022	88.17683344756682
2023	88.15652219266677