Year	Age
1990	14000
1991	14000
1992	15000
1993	15000
1994	16000
1995	16000
1996	17000
1997	18000
1998	20000
1999	21000
2000	21000
2001	21000
2002	21000
2003	21000
2004	21000
2005	20000
2006	16000
2007	12000
2008	9600
2009	8500
2010	7300
2011	6400