Year	% of total population ages 15+ (national estimate)
1989	68.42
1992	70.742
1993	68.361
1994	65.867
1995	65.143
1996	63.892
1997	62.248
1998	61.136
1999	65.276
2000	65.461
2001	64.205
2002	64.869
2003	64.693
2004	65.412
2005	65.98
2006	66.341
2007	67.085
2008	67.434
2009	67.634
2010	67.69
2011	68.35
2012	68.642
2013	68.51
2014	68.884
2015	69.141
2016	69.542
2017	62.761
2018	62.863
2019	62.215
2020	61.885
2021	62.281
2022	62.244
2023	62.707