Year	Total
1985	1495000000
1986	1500000000
1987	1500000000
1988	1510000000
1989	1983000000
1990	2456000000
1991	2929000000
1992	3161000000
1993	3809000000
1994	3306000000
1995	3047000000
1996	3626000000
1997	3681000000
1998	4330000000
1999	3974000000
2000	3512000000
2001	3049000000
2002	2586000000
2003	2123000000
2004	2148000000
2005	3080000000
2006	3555000000
2007	3988000000
2008	4420000000