Year	% (national estimate)
1989	55.23
1996	40.71
1997	39.48
1998	39.824
1999	34.801
2000	31.842
2001	31.121
2002	33.876
2003	32.346
2004	30.639
2005	31.971
2006	33.998
2007	35.793
2008	36.511
2009	35.873
2010	37.178
2011	33.65
2012	36.067
2013	35.991
2014	35.298
2015	37.13
2016	35.941
2017	36.548
2018	34.744
2019	32.825
2020	31.533
2021	29.937
2022	33.1
2023	32.735