Year	Total
1990	1400000
1991	1700000
1992	2000000
1993	2200000
1994	2600000
1995	3100000
1996	3600000
1997	4400000
1998	5100000
1999	5700000
2000	6300000
2001	6900000
2002	7557000
2003	8277000
2004	11110000
2005	13940000
2006	14900000