Year	% (national estimate)
1989	53.05
1997	50.86
1998	53.293
1999	48.401
2000	41.766
2001	38.015
2002	35.975
2003	35.675
2004	32.012
2005	29.639
2006	29.142
2007	31.637
2008	34.603
2009	32.657
2010	31.323
2011	32.059
2012	32.373
2013	35.779
2014	38.594
2015	36.724
2016	38.683
2017	37.788
2018	38.763
2019	38.907
2020	38.86
2021	38.143
2022	36.494
2023	36.038