Year	ages 15+
1990	21000
1991	23000
1992	26000
1993	27000
1994	27000
1995	26000
1996	25000
1997	24000
1998	22000
1999	21000
2000	20000
2001	19000
2002	18000
2003	18000
2004	18000
2005	17000
2006	17000
2007	17000
2008	17000
2009	17000
2010	17000
2011	16000
2012	16000
2013	16000
2014	16000
2015	16000
2016	17000
2017	16000
2018	17000