Year	current US$
1990	703639696.683139
1991	431219533.529898
1992	597636315.254291
1993	470015414.09653
1994	717620796.699613
1995	803371748.626379
1996	721691555.599727
1997	619676450.144833
1998	644704457.51514
1999	509461142.986218
2000	660395389.229823
2001	406359308.605716
2002	503630738.756129
2003	681756763.497248
2004	1214632009.48954
2005	1333187873.60703
2006	1911004853.19068
2007	1573862427.07515
2008	1345286351.33112
2009	465185707.658468
2010	852789424.011845
2011	395999774.918153
2012	545817084.191514
2013	975167972.243257
2014	1480878236.98972
2015	602447721.618369
2016	-543187560.192449
2017	335200408.998891
2018	145407954.13401
2019	259114755.60272
2020	612284896.712992
2021	-658118279.023393