Year	% (national estimate)
1960	44.04
1970	45.06
1979	43.46
1981	41.81
1991	60.6
1992	66.6
1993	44.89
1994	55.2
1996	53.39
1997	54.93
1998	52.19
2000	45.233
2001	43.706
2002	43.919
2003	41.169
2004	41.78
2005	41.166
2006	41.087
2007	41.56
2008	41.998
2009	37.423
2010	38.575
2011	40.536
2012	41.184
2013	41.047
2014	40.866
2015	44.046
2016	44.722
2017	43.6
2018	44.669
2019	45.473
2020	39.179
2021	45.532
2022	45.796
2023	47.614