Year	current US$
1995	3451284225.64024
1996	4388654542.01733
1997	4747957406.8573
1998	3233425706.25254
1999	3623483572.31239
2000	1154040090.35329
2001	2670076777.31664
2002	3309572931.85593
2003	4140183989.95612
2004	4031398954.14124
2005	3892243916.81016
2006	4430677011.10875
2007	6282180453.21384
2008	7429177613.69152
2009	6603983074.23454
2010	5767588600.29659
2011	7173695312.70784
2012	6214657236.44978
2013	6349411829.7155
2014	6138436734.77497
2015	5088363899.22813
2016	5268449548.92235
2017	5826915517.83341
2018	6795429509.30889
2019	7237737709.71744
2020	7776958327.38005
2021	9471006541.81642