Year	% (national estimate)
1990	53.39
1991	50.258
1992	48.862
1993	47.756
1994	48.435
1995	44.357
1996	51.516
1997	54.185
1998	57.343
1999	56.781
2000	58.674
2001	58.073
2002	56.984
2003	56.108
2004	54.9
2005	53.383
2006	52.412
2007	54.487
2008	57.318
2009	52.668
2010	51.655
2011	50.784
2012	52.222
2013	51.978
2014	50.154
2015	50.275
2016	48.505
2017	48.198
2018	48.997
2019	49.933
2020	49.135
2021	53.383
2022	57.852
2023	58.534