Year	Age
1987	133
1990	4000
1991	5500
1992	7300
1993	9200
1994	11000
1995	14000
1996	16000
1997	18000
1998	20000
1999	21000
2000	23000
2001	24000
2002	25000
2003	25000
2004	26000
2005	26000
2006	26000
2007	26000
2008	27000
2009	27000
2010	27000
2011	28000