Year	Total
1990	4000000
1991	4200000
1992	6200000
1993	6700000
1994	7800000
1995	8500000
1996	9400000
1997	11280000
1998	13560000
1999	15680000
2000	17920000
2001	19500000
2002	20700000
2003	25000000
2004	30000000
2005	35000000
2006	40000000