Year	% of total population ages 15+ (national estimate)
1960	71.29
1970	70.56
1978	67.29
1988	65.28
1992	69.384
1993	68.818
1994	68.406
1995	67.366
1996	66.882
1997	57.66
1998	57.235
1999	56.731
2000	57.003
2001	57.026
2002	55.852
2003	54.8
2004	54.539
2005	55.079
2006	54.178
2007	53.868
2008	54.38
2009	55.102
2010	55.489
2011	55.743
2012	56.095
2013	56.192
2014	56.528
2015	56.463
2016	56.549
2017	56.786
2018	56.704
2019	56.562
2020	56.464
2021	57.753
2022	57.98
2023	58.141