Year	% (national estimate)
1996	33.954
1997	34.294
1998	33.984
1999	31.234
2000	27.386
2001	26.423
2002	27.164
2003	23.583
2004	29.128
2005	29.822
2006	30.265
2007	31.432
2008	33.169
2009	31.014
2010	30.008
2011	26.896
2012	23.726
2013	23.03
2014	23.962
2015	27.076
2016	26.056
2017	30.386
2018	31.058
2019	29.943
2020	24.038
2021	26.573
2022	29.071
2023	28.383