Year	% (national estimate)
1990	46.6
1991	47
1992	47.3
1993	47.1
1994	44.8
1995	43.7
1996	43.7
1997	46.2
1998	46.7
1999	46.7
2000	49.5
2001	46.4
2002	47.6
2003	51.9
2004	53.567
2005	54.434
2006	55.568
2007	55.8
2008	55.692
2009	55.526
2010	55.544
2011	56.297
2012	56.006
2013	55.705
2014	55.123
2017	53.899
2018	54.1
2019	54.355
2020	49.602
2021	55.085
2022	57.3
2023	58.462