Year	Age
1990	1000
1991	1600
1992	2500
1993	3700
1994	5200
1995	6900
1996	8600
1997	10000
1998	12000
1999	13000
2000	14000
2001	15000
2002	15000
2003	16000
2004	16000
2005	15000
2006	15000
2007	14000
2008	12000
2009	11000