Year	% (national estimate)
1990	55.231
1991	48.602
1992	39.531
1993	34.385
1994	31.854
1995	29.187
1996	27.731
1997	31.282
1998	32.517
1999	44.999
2000	45.374
2001	46.168
2002	44.755
2003	44.316
2004	43.307
2005	43.976
2006	44.98
2007	44.435
2008	44.648
2009	39.63
2010	38.695
2011	40.463
2012	41.708
2013	41.5
2014	41.162
2015	40.561
2016	41.67
2017	42.384
2018	43.883
2019	44.183
2020	40.875
2021	43.839
2022	46.278
2023	45.888