Year	% (national estimate)
1996	37.135
1997	42.626
1998	38.403
1999	34.661
2000	34.715
2001	34.053
2002	34.766
2003	33.333
2004	38.277
2005	38.061
2006	39.243
2007	43.187
2008	42.996
2009	39.126
2010	37.615
2011	35.665
2012	30.407
2013	29.669
2014	29.477
2015	32.034
2016	31.087
2017	38.61
2018	38.859
2019	36.229
2020	29.607
2021	32.212
2022	35.144
2023	36.35