Year	constant 2021 US$
1990	1016280029.29688
1991	4482299804.6875
1992	5301150390.625
1993	6811700195.3125
1994	6603799804.6875
1995	6114799804.6875
1996	5235369628.90625
1997	4549989746.09375
1998	5671290039.0625
1999	6623279785.15625
2000	5664359863.28125
2001	4162100097.65625
2002	4478419921.875
2003	4099270019.53125
2004	4168129882.8125