Year	current US$
1990	28146398300.4183
1991	26343928050.8044
1992	28764380428.1131
1993	34341319440.3267
1994	48935550189.1037
1995	42385901170.6801
1996	50449377283.2038
1997	40489740272.5922
1998	33908067311.0969
1999	1822082755.58779
2000	7940431933.26734
2001	1814794962.79841
2002	7546052673.20051
2003	14027515617.3169
2004	36630735554.4676
2005	43672110157.9387
2006	66284965115.8489
2007	100846721486.003
2008	108246323306.742
2009	49767328484.4476
2010	71669442853.2916
2011	63590359426.8161
2012	-12506902640.5575
2013	2490980938.38083
2014	-49602467996.3342
2015	-73889219264.2514
2016	-92082793952.8261
2017	-73739111872.2144
2018	-87575964800.1741
2019	-91326885053.9826
2020	-21058329139.7013
2021	-3856128148.57402