Year	Total
1990	1100000
1991	1300000
1992	1500000
1993	1700000
1994	1900000
1995	2400000
1996	3100000
1997	3800000
1998	4300000
1999	4800000
2000	7000000
2001	9000000
2002	7972000
2003	9346000
2004	10960000
2005	12000000
2006	16000000