Year	current US$
1990	755239629.411121
1991	506406426.074094
1992	1141516907.55051
1993	1409686575.92745
1994	1750816693.36761
1995	1715450107.92874
1996	2064955586.98263
1997	2236565185.17741
1998	1926564871.40399
1999	1704795964.04763
2000	2136674517.93324
2001	1817204629.39778
2002	1684290384.61469
2003	1684554820.9069
2004	1457641852.8321
2005	1983116789.91625
2006	2579599264.29828
2007	4533703078.9908
2008	5995284771.02722
2009	6357530300.99293
2010	5427943253.88605
2011	8143807768.59044
2012	10460424838.8742
2013	12221385046.367
2014	11849982034.1433
2015	14871184780.1986
2016	14594007539.5285
2017	16704751783.5025
2018	15375347141.9891
2019	14556073617.7247
2020	9641393621.07792
2021	11505770298.1839