Year	ages 15+
1990	1700000
1991	1900000
1992	2100000
1993	2200000
1994	2400000
1995	2400000
1996	2500000
1997	2500000
1998	2500000
1999	2400000
2000	2300000
2001	2200000
2002	2200000
2003	2100000
2004	2000000
2005	2000000
2006	1900000
2007	1900000
2008	1900000
2009	1800000
2010	1800000
2011	1800000
2012	1800000
2013	1700000
2014	1700000
2015	1700000
2016	1700000
2017	1600000
2018	1600000