Year	% (national estimate)
1991	45.23
2002	40.383
2003	38.432
2004	40.03
2005	38.136
2006	35.907
2007	36.614
2008	36.635
2009	36.293
2010	35.852
2011	32.463
2012	30.087
2013	29.866
2014	33.631
2015	33.191
2016	37.237
2017	35.684
2018	33.494
2019	33.204
2020	32.467
2021	32.96
2022	35.001
2023	31.233