Year	current US$
1990	12359950.9704331
1991	12809253.5091174
1992	12056347.0079757
1993	9675196.21531838
1994	2782300.30390816
1995	13758427.1026605
1996	16872340.4975398
1997	21026247.5989798
1998	22426086.3331432
1999	24496390.3602408
2000	27285568.5492497
2001	31050945.465252
2002	36879555.200611
2003	38033316.8100077
2004	36844266.9585696
2005	39552619.70683
2006	42180917.4916564
2007	52794157.4424385
2008	54480610.7816624
2009	54958779.4627789
2010	70302477.8717721
2011	80536646.49964
2012	75189519.8379059
2013	85662276.1150455
2014	101685685.367678
2015	114054845.172961
2016	120662818.625247
2017	124598916.238571
2018	128898071.671363
2019	135386014.254348
2020	137994901.278505
2021	147399409.076045