Year	% (national estimate)
1998	43.568
1999	42.178
2000	41.559
2001	41.507
2002	39.561
2003	39.431
2004	41.284
2005	42.655
2006	44.586
2007	46.988
2008	48.82
2009	49.651
2010	49.909
2011	52.311
2012	51.945
2013	50.879
2014	52.182
2015	51.332
2016	51.029
2017	50.757
2018	50.324
2019	50.304
2020	47.687
2021	49.956
2022	50.616
2023	50.692