Year	current US$
1990	404226852.911684
1991	511827959.903172
1992	584075614.864722
1993	551510069.833217
1994	556964906.142148
1995	571839498.583827
1996	562011308.388534
1997	534256474.096786
1998	506352908.145468
1999	474334837.948055
2000	449679533.221925
2001	435194357.3504
2002	166965343.419894
2003	185957987.451289
2004	198657262.208679
2005	207048997.394748
2006	216895198.348111
2007	262235826.783845
2008	336867779.84177
2009	359729672.033895
2010	442174307.125568
2011	571063125.805796
2012	633242881.822345
2013	677403677.499212
2014	702440085.689129
2015	808618161.132093
2016	793528400.604435
2017	872661630.803755
2018	727131724.673013
2019	638265406.354461
2020	600474771.190237
2021	676972642.263864