Year	constant 2021 US$
1990	882880004.882813
1991	2277189941.40625
1992	4180930175.78125
1993	4773229980.46875
1994	3592379882.8125
1995	3502619873.04688
1996	3007079833.98438
1997	2238629882.8125
1998	2998689941.40625
1999	4427299804.6875
2000	3988550048.82813
2001	3227389892.57813
2002	3306760009.76563
2003	2889169921.875
2004	3083989990.23438