Year	current US$
1996	-338420765.862923
1997	-479927810.511185
1998	-530883486.474548
1999	-409357381.128449
2000	140410684.460182
2001	-255059371.599823
2002	-274575722.642777
2003	-270587377.110841
2004	-360680735.054107
2005	-111097585.979302
2006	134058236.289632
2007	-471328041.743955
2008	-383572850.453071
2009	37330681.0815705
2010	316471850.204551
2011	702313762.506105
2012	675414046.242767
2013	1008550904.05053
2014	1367853047.27303
2015	1150884740.27314
2016	1460441176.21499
2017	1855194078.84701
2018	2164303461.42006
2019	1969949365.04457
2020	1417400552.83514
2021	1935239515.17632