Year	% (national estimate)
1986	48.33942930604878
1987	48.68686824353696
1988	48.96299909550268
1989	49.527576258947335
1990	49.018545960212464
1991	47.968312094736426
1992	45.70223131268557
1993	44.962939712404015
1994	44.34811412703901
1995	44.035968275386956
1996	43.072560058100755
1997	42.33877443821486
1998	42.03964745680237
1999	42.056699512787745
2000	42.398748445527865
2001	41.85092131382884
2002	41.24916239134302
2003	40.97329021806146
2004	40.94573179065486
2005	40.93158579526789
2006	40.50370390100594
2007	41.507012376113536
2008	41.35399198065846
2009	37.850769177407734
2010	37.742139259159025
2011	37.927541332096595
2012	36.87912739790689
2013	37.30004736802163
2014	37.75239859062373
2015	39.083189574600745
2016	39.71389453544621
2017	39.39747133841171
2018	39.85978147826745
2019	40.270755020637885
2020	37.25360822090385
2021	39.59486097443246
2022	40.858564089691164
2023	41.34006973683146