Year	current US$
1974	180000.00715255702
1978	9999.99977648258
1990	21109999.636188176
1991	5649999.894201755
1992	41470001.37157737
1993	27869999.229907937
1994	40670000.78968699
1995	15210000.06794929
1996	18509999.960660927
1997	19140000.177547336
1998	22279999.827966075
1999	7759999.8936057
2000	8120000.002905726
2001	22909999.426454324
2002	20019999.433308836
2003	19760000.161826596
2004	19140000.067651253
2005	15489999.7711182
2006	14939999.5803833
2007	6920000.07629395
2008	4230000.01907349
2009	3599999.90463257
2010	3460000.03814697