Year	% (national estimate)
1991	58.59
1993	52.09
1994	47.358
1995	46.279
1996	46.621
1997	47.02
1998	45.19
1999	45.446
2000	44.731
2001	44.526
2002	42.771
2003	40.811
2004	39.226
2005	36.584
2006	35.222
2007	34.647
2008	32.401
2009	31.311
2010	30.962
2011	30.078
2012	30.488
2013	30.789
2014	31.661
2015	31.783
2016	32.417
2017	33.183
2018	32.288
2019	29.683
2020	28.141
2021	26.252
2022	26.576
2023	27.036