Year	Total
1991	20000
1992	40000
1993	70000
1994	110000
1995	150000
1996	175000
1997	200000
1998	225000
1999	250000
2000	275000
2001	300000
2002	402700
2003	540000
2004	724000
2005	866300
2006	1710000