Year	% (national estimate)
1998	45.838
1999	43.413
2000	41.115
2001	39.125
2002	34.201
2003	32.454
2004	35.296
2005	37.573
2006	38.389
2007	41.263
2008	41.795
2009	42.713
2010	42.537
2011	44.722
2012	43.537
2013	43.086
2014	42.763
2015	39.223
2016	37.698
2017	36.128
2018	35.364
2019	34.441
2020	28.602
2021	30.77
2022	33.708
2023	32.474