Year	constant 2021 US$
1990	22709999.084472697
1991	514020019.53125
1992	226789993.28613302
1993	180380004.882813
1994	234559997.55859402
1995	147009994.506836
1996	240619995.117188
1997	324380004.88281304
1998	352920013.42773396
1999	398149993.89648396
2000	497549987.792969
2001	571820007.324219
2002	512299987.792969
2003	569190002.441406
2004	752729980.46875