Year	% (national estimate)
1976	45.36
1980	46.62
1981	46.38
1982	46.17
1985	44.66
1986	45
1987	44.97
1990	42.859
1992	41.535
1995	45.41
1996	44.1
1997	52.76
1999	54.517
2000	51.6
2005	49.315
2006	54.776
2008	51.082
2009	50.797
2011	52.598
2012	44.868
2013	46.093
2014	51.413
2015	44.082
2016	43.539
2017	44.536
2018	49.606
2019	53.704
2020	49.699
2021	62.055
2022	61.529