Year	current US$
1990	-1188987184.54728
1991	-338114485.679897
1992	-1074610270.15214
1993	-1244198054.66794
1994	-511965690.449108
1995	-537076726.822244
1996	-282113365.940836
1997	-32725030.6887369
1998	-349322113.224726
1999	-161346627.539511
2000	-440026324.641239
2001	-277946202.743976
2002	-216683674.936641
2003	-127365918.402649
2004	-197190944.271938
2005	309051013.544527
2007	-95158891.8015609
2008	241268716.96572
2009	-30593804.2774777
2010	48502298.0241175
2011	224532070.902429
2012	-4127016.76873875
2013	400282330.017644
2014	1819707797.87097
2015	1863813692.75429