Year	current US$
1990	566738197.710429
1991	410054038.704968
1992	420315690.359004
1993	446490309.667783
1994	380979272.622523
1995	353749622.973858
1996	376550806.940502
1997	370787599.984288
1998	347193670.673883
1999	342293274.733962
2000	366864457.317838
2001	350473947.404358
2002	342912257.019291
2003	378048868.928128
2004	446031105.156013
2005	493605355.962379
2006	537467030.17426
2007	584885675.087797
2008	702590957.391419
2009	546041922.685283
2010	627412719.790615
2011	745327352.620439
2012	746537127.029574
2013	762821390.475012
2014	736633782.737097
2015	570731979.000875
2016	541460363.587907
2017	578528379.336622
2018	606628047.975065
2019	600470770.260357
2020	539987679.400767
2021	590749738.995624