Year	current US$
1990	2287570068.35938
1991	6644069824.21875
1992	6048169921.875
1993	5990109863.28125
1994	6873610351.5625
1995	8741209960.9375
1996	5670169921.875
1997	5866200195.3125
1998	7273089843.75
1999	7991819824.21875
2000	7770339843.75
2001	6172500000
2002	6395529785.15625
2003	7105270019.53125
2004	8729570312.5