Year	current US$
1990	1498423386.12361
1991	2674734111.82854
1992	3529659403.20602
1993	3924506961.94331
1994	4381881439.65978
1995	7326401478.25712
1996	8781831921.09814
1997	9991407372.65199
1998	9472895547.18365
1999	6838278359.30435
2000	6603587335.05615
2001	7126213622.74488
2002	7457718290.14561
2003	7662827694.01145
2004	7653937994.20369
2005	10489448127.6239
2006	10118649344.0328
2007	11802636520.6966
2008	11547511916.6818
2009	16232856726.9922
2010	22964904943.3612
2011	14833347303.6486
2012	25297778326.2187
2013	26144364195.418
2014	23918394545.3862
2015	28651524613.9706
2016	20464841924.028
2017	16722544240.506
2018	12560642645.6379
2019	17788456423.7126
2020	10935400542.0981
2021	-11166411849.3017