Year	current US$
1990	-218873293.628441
1991	-173563356.201931
1992	-241100267.248743
1993	-148200027.297609
1994	-226556074.261737
1995	-310111584.343473
1996	-339995793.379072
1997	-306945878.54427
1998	-351514277.456166
1999	-214832029.052739
2000	-243140908.330091
2001	-277439214.579653
2002	-282183926.93897
2003	-374179119.673961
2004	-345999979.503675
2005	-282135040.290302
2006	-360236150.68557
2007	-528311010.087414
2008	-762200884.636556
2009	-569194086.544639
2010	-625552541.078753
2011	-746094919.081074
2012	-399407771.240474
2013	-580852783.409282
2014	-710830951.089797
2015	-438747100.092942
2016	-589572122.523609
2017	-591717795.052393
2018	-526769104.515992