Year	current US$
1990	1664830025.6729174
1991	4138359970.092778
1992	2534090026.8554735
1993	1804770057.6782222
1994	2714990020.7519536
1995	4500429889.678956
1996	2226469989.7766137
1997	1910779983.520507
1998	2640660011.2915063
1999	3032530014.038084
2000	3186090026.855472
2001	3150239997.8637695
2002	2355969997.406005
2003	3500669998.1689487
2004	4473780044.555667
2011	280000.001192093