Year	% of total population ages 15+ (national estimate)
1961	40.63
1975	41.36
1979	43.08
2000	39.4
2001	38.8
2002	38.4
2003	37.4
2005	38.3
2006	37.7
2007	39.8
2008	39.5
2009	40.1
2010	39.5
2011	39
2012	38
2013	37.1
2014	36.4
2017	40.226
2018	39.176
2019	39.242
2020	39.947
2021	38.67
2022	38.555