Year	current US$
1991	5.950736428965061
1992	116.00541854964865
1993	616.2144460487924
1994	929.5746755829596
1995	658.5538911610666
1996	1357.0569762390141
1997	1010.9247928716873
1998	799.036933681369
1999	1097.4477436388659
2000	875.2581713719516
2001	1244.3717325725966
2002	1022.6438553698675
2003	956.6366518289541
2004	917.0570068695747
2005	1035.9423765671145
2006	1020.6980857263633
2007	986.7130481295421
2008	988.7393913422161
2009	1141.380369991329
2010	466.7140988687996
2011	1595.5899764600708
2012	1606.2294978089592
2013	1825.4400581042512
2014	1104.7422749943375
2015	1154.8269858994333
2016	259.88537771558896
2017	1536.6520892667577
2018	1182.8915942046772
2019	1475.138690684439
2020	4217.400233522009
2021	2547.443584936552
2022	3376.0734282251433