Year	% (national estimate)
1998	32.927
1999	32.351
2000	30.262
2001	28.324
2002	28.259
2003	30.883
2004	28.874
2005	32.249
2006	35.296
2007	38.116
2008	37.011
2009	27.484
2010	25.375
2011	25.844
2012	28.69
2013	30.225
2014	32.478
2015	34.536
2016	32.824
2017	32.991
2018	33.109
2019	31.78
2020	29.65
2021	27.869
2022	30.605
2023	30.627