Year	% of total population ages 15+ (national estimate)
1960	63.66
1970	66.61
1980	66.92
2000	64.96
2001	64.59
2002	63.61
2003	63.77
2004	63.06
2005	63.02
2006	63.1
2007	63.89
2008	62.25
2009	61.8
2010	61.63
2011	63.12
2012	62.5
2013	61.9
2014	61.75
2015	61.42
2016	60.9
2017	60.4