Year	constant 2021 US$
1990	23030000.6866455
1991	377790008.544922
1992	202929992.67578098
1993	155059997.55859402
1994	226149993.89648402
1995	196039993.28613302
1996	174410003.66210902
1997	172559997.55859402
1998	677500000
1999	499130004.88281304
2000	783520019.53125
2001	564789978.027344
2002	267299987.792969
2003	360200012.207031
2004	340179992.675781