Year	constant 2021 US$
1990	426739990.234375
1991	541590026.855469
1992	737359985.351563
1993	465510009.765625
1994	416670013.42773396
1995	424850006.10351604
1996	576559997.558594
1997	405320007.324219
1998	696859985.351563
1999	865849975.585938
2000	863589977.2644045
2001	801229985.237122
2002	717640024.1851811
2003	453429993.62945515
2004	476650006.29425097