Year	current US$
1990	136807692.604108
1991	150508728.732129
1992	153249566.412491
1993	163356573.780376
1994	158298243.606564
1995	132386643.010044
1996	139117222.592922
1997	136422267.886294
1998	129591964.535797
1999	140587979.458773
2000	158887392.36842
2001	176990389.151936
2002	197900116.023116
2003	215171915.879327
2004	257247998.8951
2005	277100989.094052
2006	287418811.652683
2007	286118577.904025
2008	295751903.554037
2009	288326448.130701
2010	315218008.182215
2011	325129407.637187
2012	332138805.857957
2013	328102656.075412
2014	324922791.789898
2015	317475841.025834
2016	317817269.108038
2017	336753835.387213
2018	365145897.437611
2019	386991948.831585
2020	379278860.147885
2021	406219847.069048