Year	current US$
1990	530006116.725828
1991	617339669.143034
1992	507581932.32995
1993	373904922.222468
1994	282685004.271154
1995	285262506.757268
1996	284332424.059389
1997	284645564.159616
1998	267352399.612148
1999	246832976.218321
2000	245408286.569995
2001	226709399.869553
2002	209234577.010592
2003	229221157.21361
2004	233604414.411482
2005	262309572.682265
2006	294959804.589108
2007	354266676.766263
2008	462750905.104913
2009	526075324.697508
2010	440219161.639873
2011	438098202.846192
2012	558813539.815142
2013	565691969.96948
2014	629041508.887751
2015	677298158.773087
2016	730605573.058959
2017	763689005.912047
2018	758935531.475585
2019	810642125.642816
2020	862901393.451216
2021	832033751.269282