Year	% (national estimate)
1986	45.76793394964142
1987	46.375143888270145
1988	46.676167366095015
1989	47.292529970068124
1990	46.614455656555705
1991	45.99410072192868
1992	43.20930996580853
1993	42.79968941408165
1994	42.008170006608
1995	41.63246758923335
1996	40.7231285537697
1997	40.06010546499455
1998	39.870676366460806
1999	39.61419524066476
2000	40.085202718420085
2001	39.726305241197565
2002	39.2430952516951
2003	39.15205709662912
2004	39.091982873067685
2005	39.218348551524215
2006	38.44325867907786
2007	39.704333659684266
2008	39.5138234353497
2009	36.755548035744006
2010	36.55622788698645
2011	36.617235356894
2012	35.387519199491216
2013	35.86147558943056
2014	36.26690844519786
2015	37.8619694670394
2016	38.45397982256691
2017	37.82491037807232
2018	38.35720493573658
2019	38.83143305296339
2020	35.670668076794655
2021	38.224290971101325
2022	39.533434066306334
2023	40.23005763955986