Year	current US$
1991	491114095.63669294
1992	507002835.55321634
1993	455974546.7552761
1994	459908272.1054013
1995	468387719.6069459
1996	467337818.8391243
1997	484621754.2881189
1998	496567953.41936916
1999	480239243.72954947
2000	504491708.0950423
2001	411900168.0463061
2002	389248282.77026767
2003	382983131.91188246
2004	394157641.3666575
2005	379724793.14548063
2006	426174034.4783542
2007	384651089.97749335
2008	298998392.7901238
2009	212542566.4395914
2010	155706849.739266
2011	168242081.02359033
2012	199377611.4336865
2013	204524702.24069703
2014	228117011.757291
2015	257108363.72380075
2016	268290535.26025558
2017	288437541.93402165
2018	297800918.59938926
2019	295521822.1491437
2020	210537857.8861949
2021	256197839.1941972
2022	234339953.62300727