Year	current US$
1990	1824540027.618413
1991	3525210028.648381
1992	3886560008.0490184
1993	3812589956.2835693
1994	4040030033.111574
1995	6288689914.703375
1996	3103160016.5367126
1997	2250579988.360405
1998	2838840010.9708343
1999	4088329981.446262
2000	4479100001.215942
2001	3781840040.773154
2002	3665780007.481575
2003	4470089950.293305
2004	5453250106.811531
2021	2179999.9959766893