Year	% (national estimate)
1998	29.407
1999	27.987
2000	24.93
2001	23.638
2002	25.274
2003	23.742
2004	21.204
2005	26.079
2006	28.543
2007	32.232
2008	31.734
2009	25.395
2010	24.255
2011	23.353
2012	25.435
2013	27.017
2014	28.252
2015	31.875
2016	31.577
2017	30.911
2018	30.629
2019	29.499
2020	26.652
2021	25.563
2022	29.734
2023	29.465