Year	current US$
1987	4698.258404212232
1988	6439.393939393939
1989	6340.844795629695
1990	3400000000
1991	2000000000
1992	2472500000
1993	1938187808.896211
1994	2743618278.0718865
1995	1140185513.3458855
1996	1001877590.2072166
1997	1479432986.512524
1998	1340894232.8378484
1999	1066705737.7142302
2000	1212806577.2830763
2001	1251358575.4482477
2002	1439799970.3963473
2003	1843124461.1190083
2004	2455655258.7646074
2005	3286910229.3571653
2006	4388033697.420796
2007	5857076837.243159
2008	7425650258.386147
2009	5237873745.799877
2010	6114774437.2292185
2011	7985635652.640535
2012	9139072089.27981
2013	9262010761.415216
2014	10019433222.685818
2015	8659152476.79724
2016	8483221244.546788
2017	9341534670.469751
2018	10768774511.738016
2019	11201362124.006811
2020	8964607357.622921
2021	11109489894.128971
2022	15544538954.804197
2023	17383300322.87463