Year	% (national estimate)
1991	50.16
1993	32.45
1994	42.31
1995	46.15
1996	44.582
1997	49.61
1998	46.263
1999	41.852
2000	40.726
2001	40.074
2002	40.187
2003	38.35
2004	43.109
2005	44.541
2006	44.415
2007	47.648
2008	47.697
2009	45.373
2010	44.366
2011	41.962
2012	38.14
2013	37.129
2014	36.566
2015	38.9
2016	36.846
2017	42.87
2018	42.363
2019	39.107
2020	33.922
2021	36.415
2022	38.451
2023	40.68