Year	current US$
1990	497308792.996069
1991	679992887.095392
1992	669395702.323944
1993	594105927.071694
1994	622294189.072822
1995	711158155.248611
1996	721972029.082169
1997	688538521.027858
1998	710055404.129584
1999	653774545.105048
2000	585180870.185002
2001	617513723.008558
2002	586189182.152359
2003	598625637.612606
2004	674174756.555642
2005	814225598.512631
2006	852784375.927749
2007	996844182.923314
2008	1196766730.21017
2009	938692242.14881
2010	977723808.158725
2011	1039579333.67243
2012	958198201.264504
2013	944641973.801537
2014	908791081.106415
2015	773460118.009001
2016	754524538.445756
2017	848992889.742474
2018	921736345.539936
2019	921170216.9928
2020	960708469.311439
2021	1036045768.85443