Year	ages 15+
1990	200
1991	500
1992	500
1993	720
1994	970
1995	1200
1996	1500
1997	1800
1998	2000
1999	2100
2000	2100
2001	2000
2002	1900
2003	1700
2004	1600
2005	1500
2006	1400
2007	1400
2008	1500
2009	1600
2010	1800
2011	2100
2012	2400
2013	2800
2014	3200
2015	3700
2016	4100
2017	4800
2018	5600