Year	current US$
1990	1651210025.7873502
1991	3822679977.41699
1992	2386580032.34863
1993	1690120056.1523402
1994	2557650024.41406
1995	4387359889.98413
1996	2100539986.13358
1997	2943689958.21476
1998	3624129957.13949
1999	3774900039.74736
2000	4331480024.55011
2001	3630899970.99712
2002	3525719992.35265
2003	4173119952.4663396
2004	5469710082.79175