Year	% (national estimate)
1990	43.435
1991	41.202
1992	36.773
1993	36.187
1994	38.955
1995	33.172
1996	32.365
1997	31.486
1998	30.966
1999	24.271
2000	25.291
2001	22.699
2002	19.661
2003	20.464
2004	24.71
2005	26.78
2006	25.787
2007	29.8
2008	32.881
2009	26.651
2010	24.149
2011	28.982
2012	30.347
2013	30.665
2014	33.265
2015	32.884
2016	36.264
2017	38.188
2018	39.968
2019	37.507
2020	33.436
2021	34.015
2022	40.383
2023	38.705