Year	% (national estimate)
1976	23.5
1980	24.22
1981	24.32
1982	24.23
1985	23.92
1986	23.36
1987	23.2
1990	35.19
1992	34.564
1995	40.11
1996	42.5
1997	46.06
1999	47.124
2000	43.94
2005	43.679
2006	47.662
2008	44.998
2009	45.311
2011	44.927
2012	36.334
2013	39.573
2014	43.092
2015	34.684
2016	36.783
2017	37.985
2018	44.12
2019	47.375
2020	42.231
2021	57.908
2022	57.122