Year	current US$
1997	450809975816.68317
1998	427182487839.1072
1999	429071875862.0614
2000	423707763305.64996
2001	409062586772.3657
2002	403099938820.79175
2003	460139555054.8979
2004	528570061450.9983
2005	499186891182.17395
2006	490480074929.18896
2007	545423772905.29987
2008	577256890904.5747
2009	505876781773.4652
2010	557943951778.8698
2011	644345294286.9191
2012	633112469868.1617
2013	679039592148.2661
2014	647694495949.1674
2015	576363211906.1147
2016	569589375586.0234
2017	615794551421.0812
2018	621447015722.1458
2019	600331896028.0741
2020	622317018102.9009
2021	698523566119.4615