Year	current US$
1990	5607237258.854016
1991	5325340306.834031
1992	5069318731.33267
1993	4511035462.912831
1994	4582708196.241866
1995	4935386892.177589
1996	4148612459.5469255
1997	3670671811.4793634
1998	3556341564.353704
1999	3253825722.2739983
2000	2942628493.6049266
2001	2639208935.7667694
2002	2887817913.5121264
2003	3030539095.5669413
2004	3776583835.9469237
2005	3424160777.385159
2006	3326825650.023927
2007	3794223592.135955
2008	4444735481.48832
2009	4004230309.7141805
2010	3970026451.5184464
2011	4844413736.371421
2012	4355933241.968688
2013	4679044556.997418
2014	5150264264.817588
2015	4348277422.087585
2016	4526424166.86184
2017	4389035823.396493
2018	4670853714.655806
2019	4672636160.0966015
2020	5234639848.749787
2021	5091389411.96318
2022	5029844501.522518
2023	5568066422.553395