Year	Total
1990	2900000
1991	3500000
1992	4100000
1993	4900000
1994	5700000
1995	6400000
1996	7300000
1997	8200000
1998	9400000
1999	11100000
2000	12900000
2001	14200000
2002	15300000
2003	16480000
2004	22390000
2005	28300000
2006	30800000