Year	% (national estimate)
1962	11.9
1972	18.15
1983	29.26
1984	15.64
1987	44.56
1989	46.31
1990	34.88
1991	40.91
1992	41.69
1993	42.23
1994	43.23
1995	35.35
2000	35.68
2001	34.765
2002	37.342
2003	39.083
2004	38.759
2005	38.439
2006	39.526
2007	37.552
2008	35.39
2009	34.482
2010	36.881
2011	35.882
2012	35.985
2013	35.224
2014	35.956
2015	39.411
2016	39.107
2017	39.23
2018	40.982
2019	38.041
2020	64.431
2021	30.366
2022	29.456