Year	current US$
1997	105091001011.12234
1998	103044826423.9973
1999	115847748536.04361
2000	126793481920.4094
2001	118523372933.88431
2002	119490855795.57765
2003	131315395046.74898
2004	146770945426.59494
2005	156900478626.83612
2006	166007581100.14102
2007	174832883344.19513
2008	164795688847.23526
2009	138303735456.21555
2010	162173511981.15292
2011	178532770701.08142
2012	183205382392.94846
2013	177060852680.39853
2014	170212707042.82147
2015	155268331357.5549
2016	151699381162.32797
2017	159724381266.88773
2018	170222213294.13702
2019	162160141929.43698
2020	149267867966.17953