Year	% (national estimate)
1991	57.51
1993	42.298
1994	43.785
1995	42.144
1996	40.762
1997	40.205
1998	42.056
1999	42.118
2000	40.637
2001	37.966
2002	35.224
2003	33.979
2004	31.519
2005	28.756
2006	29.151
2007	26.867
2008	26.117
2009	26.101
2010	25.261
2011	24.121
2012	25.907
2013	26.062
2014	26.057
2015	27.356
2016	26.207
2017	26.584
2018	26.233
2019	25.852
2020	21.413
2021	21.944
2022	23.251
2023	23.942