Year	current US$
1991	15222.0466666667
1992	21325.118602986
1993	15164.4851078551
1994	20761.969487812
1995	35243.4194980756
1996	37465.0401723102
1997	34809.5148260338
1998	28430.5553623188
1999	15569.0448854364
2000	17411.6539980825
2001	20653.8329193345
2002	23604.4431767338
2003	35031.6489873406
2004	39687.563886631
2005	26741.454468734
2006	31660.4684543903
2007	48555.4626384209
2008	84189.2887753245
2009	81034.6738930954
2010	80986.4007998997
2011	110279.943842316
2012	92295.4732907266
2013	84613.8077142659
2014	129625.153933373
2015	101884.855724099
2016	119780.352729833
2017	141284.075654601
2018	66336.9811796579
2019	60742.5079016936
2020	81898.1345463318
2021	72110.0906357255