Year	% (national estimate)
1998	38.128
1999	33.924
2001	37.799
2002	36.144
2003	34.623
2004	38.336
2005	37.758
2006	37.667
2007	35.309
2008	38.387
2009	40.77
2010	36.546
2011	38.296
2012	40.809
2013	41.318
2014	36.315
2015	35.39
2016	38.164
2017	36.875
2018	37.929
2019	37.654
2020	33.695
2021	37.837
2022	37.409
2023	38.421