Year	% (national estimate)
1980	18.16
1989	56.12
1990	55.22
1991	61.09
1992	60.71
1993	65.81
1994	65.02
1997	56.14
1998	55.69
1999	54.41
2000	51.54
2001	57.463
2002	56.952
2003	58.52
2004	57.539
2005	58.111
2007	56.729
2008	56.926
2009	58.875
2010	59.598
2011	60.569
2012	61.293
2013	61.053
2014	61.096
2015	61.275
2016	60.492
2017	60.015
2018	59.131
2019	57.709
2020	53.279
2021	55.389
2022	56.498
2023	57.646