Year	% (national estimate)
1990	55.96
1991	51.515
1992	50.342
1993	49.648
1994	50.181
1995	43.413
1996	52.047
1997	55.954
1998	58.535
1999	57.829
2000	60.792
2001	59.218
2002	56.072
2003	56.199
2004	52.907
2005	53.119
2006	51.896
2007	52.842
2008	56.487
2009	51.201
2010	50.687
2011	49.357
2012	50.73
2013	50.058
2014	48.32
2015	48.921
2016	46.969
2017	47.336
2018	48.247
2019	49.508
2020	48.602
2021	51.52
2022	56.357
2023	57.757