Year	current US$
1990	68241087.5102875
1991	67110385.7321797
1992	72801063.1927895
1993	59976903.8317886
1994	41285603.4388342
1995	49839036.3831486
1996	50699469.9236895
1997	46206597.4912728
1998	54391313.2285503
1999	55065750.5515443
2000	54532853.9080674
2001	55254924.7587858
2002	62763522.7509488
2003	73128697.7874478
2004	78309425.3999971
2005	80639736.8655919
2006	77336548.6744212
2007	82042410.581837
2008	90998751.8351084
2009	81641349.5350433
2010	75370483.682465
2011	80384240.7060569
2012	78392339.2151195
2013	86130247.5582186
2014	91804386.5757032
2015	85385482.8002053
2016	127873487.349074
2017	139284830.104603
2018	153985469.139084
2019	153795269.998283
2020	161590008.925186
2021	169698419.292336