Year	% (national estimate)
1981	30.93
1985	51.04
1991	42.5
1994	49.11
1995	48.18
1996	49.4
1997	49.86
1998	53.43
1999	52.39
2001	45
2002	45.9
2005	44.6
2009	49.23
2010	50.745
2011	50.69
2012	50.48
2013	49.874
2014	49.454
2015	51.243
2016	51.446
2017	51.807
2018	49.488
2019	49.809
2020	47.786
2021	47.354
2022	47.476