Year	Total
1990	590000
1991	690000
1992	800000
1993	930000
1994	1000000
1995	1400000
1996	1600000
1997	1900000
1998	2000000
1999	2400000
2000	2700000
2001	2900000
2002	3100000
2003	3314000
2004	3543000
2005	3772000
2006	3962000