Year	current US$
1990	295923823.94797
1991	283650930.176572
1992	288355639.624624
1993	408116756.140231
1994	217372266.6225
1995	240121726.861062
1996	228429850.583204
1997	211345565.831895
1998	217516278.275824
1999	219104670.574697
2000	201654674.313636
2001	206459810.365831
2002	241655978.042944
2003	302220881.683003
2004	339258182.725956
2005	351659199.685476
2006	371035640.455167
2007	411431822.287154
2008	473590028.475388
2009	476943755.176868
2010	470881918.823487
2011	527028472.256391
2012	516556096.775746
2013	570804279.709971
2014	599952175.408443
2015	502245274.454716
2016	514539523.110216
2017	528327970.815274
2018	566607314.686962
2019	550615943.966033
2020	565310119.720749
2021	604428155.988721