Year	current US$
1990	2507981739.14855
1991	2319125000
1992	1813730325.65507
1993	1894538290.06869
1994	1376720000
1995	1574131736.52695
1996	2974690618.76248
2000	1286393133.76596
2001	1713027217.95138
2002	1653050020.33347