Year	% (national estimate)
1992	50.747
1993	48.939
1994	46.808
1995	44.956
1996	41.366
1997	35.515
1998	31.845
1999	38.355
2000	38.202
2001	37.202
2002	37.618
2003	35.497
2004	36.146
2005	36.37
2006	35.538
2007	36.553
2008	40.064
2009	37.5
2010	37.943
2011	38.802
2012	37.495
2013	38.209
2014	37.266
2015	35.437
2016	35.237
2017	33.05
2018	31.446
2019	31.089
2020	29.713
2021	29.433
2022	27.635
2023	28.664