Year	current US$
1990	18958183799.8999
1991	23200848342.3411
1992	25781300179.4643
1993	32946480668.4422
1994	36045833801.2541
1995	40232255578.2586
1996	39940733822.5224
1997	25689723588.6096
1998	15369364341.7109
1999	17407786758.725
2000	16730079956.8228
2001	12094780723.0265
2002	15726766992.7115
2003	18843833277.1237
2004	22034833971.9177
2005	23884415227.0477
2006	33747189021.121
2007	46555858977.8828
2008	42455987027.4128
2009	39800258530.2901
2010	49324761302.2954
2011	61059025188.4801
2012	49287224066.2096
2013	45256567207.4412
2014	41963138208.7553
2015	44404901329.9586
2016	55674705996.5185
2017	71011391827.3011
2018	76708212597.2327
2019	82021752789.699
2020	50116265745.5921
2021	46915879894.0897