Year	% (national estimate)
1990	81.183
1991	79.469
1992	75.769
1993	71.443
1994	70.615
1995	66.323
1996	65.022
1997	64.623
1998	62.026
1999	58.557
2000	56.496
2001	56.753
2002	57.182
2003	58.717
2004	58.328
2005	58.977
2006	63.437
2007	64.653
2008	64.788
2009	56.6
2010	54.049
2011	59.13
2012	60.89
2013	62.163
2014	63.467
2015	64.747
2016	65.088
2017	66.337
2018	67.086
2019	67.374
2020	65.291
2021	65.16
2022	67.048
2023	67.19