Year	current US$
1990	21326974.2234924
1991	26258969.6936906
1992	27461679.2959446
1993	28885368.4109505
1994	30312429.6267889
1995	31950125.1606227
1996	33585507.9715179
1997	35264494.0045881
1998	36463789.2286984
1999	38164666.1409548
2000	27471184.6618297
2001	29498398.1919894
2002	22571093.4600511
2003	25845846.3428999
2004	30666785.545764
2005	39319957.4663765
2006	37521396.210426
2007	36312079.0064089
2008	39183100.9559285
2009	40045342.9446063
2010	49726142.386357
2011	58165356.2003868
2012	75810920.216097
2013	74025132.8211741
2014	88217379.3738164
2015	94582068.5486601
2016	105939086.848685
2017	93542732.0520035
2018	86585029.365878
2019	108064143.945632
2020	96860701.8365803
2021	103667481.49013