Year	% (national estimate)
1992	53.125
1993	52.134
1994	51.874
1995	51.778
1996	51.823
1997	43.673
1998	44.053
1999	43.147
2000	41.129
2001	40.422
2002	39.056
2003	38.593
2004	38.182
2005	38.741
2006	39.824
2007	41.645
2008	43.073
2009	43.375
2010	43.007
2011	43.003
2012	43.138
2013	43.092
2014	44.156
2015	45.049
2016	45.714
2017	46.465
2018	47.031
2019	46.842
2020	46.76
2021	48.485
2022	49.271
2023	49.647