Year	Age
1990	11000
1991	12000
1992	13000
1993	13000
1994	14000
1995	14000
1996	14000
1997	14000
1998	14000
1999	13000
2000	13000
2001	12000
2002	12000
2003	12000
2004	12000
2005	11000
2006	11000
2007	10000
2008	9800
2009	9500
2010	9200
2011	8600