Year	% (national estimate)
1992	28.224
1993	25.861
1994	24.76
1995	23.549
1996	23.776
1997	23.622
1998	24.515
1999	21.468
2000	21.87
2001	21.806
2002	19.602
2003	18.242
2004	18.268
2005	19.609
2006	20.984
2007	22.359
2008	23.697
2009	23.158
2010	22.093
2011	19.984
2012	19.862
2013	19.513
2014	21.35
2015	21.298
2016	23.745
2017	25.173
2018	27.016
2019	27.799
2020	24.221
2021	22.829
2022	23.384
2023	25.283