Year	ages 15+
1990	740
1991	830
1992	920
1993	990
1994	1000
1995	1100
1996	1100
1997	1200
1998	1200
1999	1200
2000	1200
2001	1200
2002	1300
2003	1300
2004	1300
2005	1300
2006	1300
2007	1400
2008	1400
2009	1400
2010	1400
2011	1400
2012	1400
2013	1400
2014	1400
2015	1400
2016	1400
2017	1300
2018	1300