Year	Total
1990	260000
1991	330000
1992	440000
1993	590000
1994	750000
1995	950000
1996	1200000
1997	1500000
1998	1700000
1999	2000000
2000	2677000
2001	2600000
2002	3273000
2003	3766000
2004	4187000
2005	4172000
2006	4482000