Year	% (national estimate)
1998	28.212
1999	29.7
2000	23.785
2001	21.041
2002	21.533
2003	19.364
2004	16.173
2005	17.408
2006	21.014
2007	20.012
2008	21.778
2009	20.071
2010	17.397
2011	17.011
2012	20.142
2013	21.517
2014	24.051
2015	25.657
2016	27.832
2017	28.418
2018	30.649
2019	32.348
2020	28.278
2021	29.295
2022	32.349
2023	31.882