Year	current US$
1990	289000000
1991	368299987.792969
1992	557700012.207031
1993	328440002.441406
1994	290350006.10351604
1995	319619995.11718804
1996	398059997.558594
1997	272579986.57226604
1998	468399993.89648396
1999	573159973.144531
2000	543320007.324219
2001	514830017.089844
2002	476209991.455078
2003	328359985.35156304
2004	376390014.64843804