Year	% (national estimate)
1998	32.999
1999	32.101
2000	26.659
2001	22.578
2002	25.24
2003	23.566
2004	20.556
2005	21.214
2006	23.667
2007	24.788
2008	26.014
2009	20.649
2010	18.274
2011	18.989
2012	21.48
2013	24.615
2014	27.632
2015	28.314
2016	30.233
2017	30.397
2018	32.429
2019	32.895
2020	29.431
2021	31.108
2022	31.974
2023	30.831