Year	% of total population ages 15+ (national estimate)
1998	65.4
1999	66
2000	64.1
2001	66.21
2002	64.95
2003	66.02
2004	64.77
2005	64.05
2006	62.2
2007	63.3
2008	63.49
2009	64.588
2010	65.494
2011	66.218
2012	67.554
2013	67.152
2014	67.697
2015	68.781
2016	68.425
2017	65.832
2018	63.934
2019	62.928
2020	63.399