Year	current US$
1990	26431172023.151596
1991	31014362657.091564
1992	32147766139.945232
1993	31672963826.921185
1994	28345600055.11413
1995	23814227122.17054
1996	26557005494.505493
1997	29184188028.62437
1998	27664070286.20069
1999	28455556250.28298
2000	27136414221.28507
2001	25017188264.381947
2002	16954330708.661417
2003	17277216718.75
2004	19882699846.153847
2005	21433046465.680977
2006	32486532904.172745
2007	38008228757.88523
2008	47700075680.67658
2009	49344413474.22567
2010	49399465893.68869
2011	41769404453.04178
2012	59678280994.87976
2013	65221688899.5134
2014	64284793642.26085
2015	54782835340.02795
2016	55878763119.71858
2017	62560158413.56846
2018	64841201289.11542
2019	68452205486.378456
2020	70118704268.19388
2021	39929892422.62303
2022	42228301235.67084
2023	36693537615.60378