Year	% (national estimate)
1992	33.718
1993	30.262
1994	29.452
1995	26.965
1996	23.954
1997	24.707
1998	29.857
1999	31.157
2000	29.17
2001	26.362
2002	25.555
2003	23.401
2004	20.287
2005	19.239
2006	18.581
2007	17.704
2008	17.073
2009	16.207
2010	16.55
2011	16.167
2012	17.043
2013	17.033
2014	20.454
2015	23.098
2016	24.606
2017	24.8
2018	24.305
2019	24.008
2020	23.117
2021	23.917
2022	24.839
2023	23.896