Year	% (national estimate)
1966	14.9
1972	9.61
1976	16.71
1986	10.58
1991	12.44
1996	10.61
2005	16.599
2006	15.441
2007	14.152
2008	12.098
2009	12.468
2010	12.229
2011	10.442
2012	11.421
2013	9.638
2014	8.602
2015	9.601
2016	10.98
2017	12.248
2018	11.969
2019	11.087
2020	7.98
2021	7.988
2022	8.056