Year	current US$
1999	4929116993.92699
2000	4444414783.93835
2001	4157876630.91976
2002	4121082606.14084
2003	4253989222.13658
2004	8191129093.23533
2005	10008497343.4164
2006	8416260370.30863
2007	14311933533.4178
2008	11902664704.2619
2009	268831574.141871
2010	3941759417.28281
2011	4428612782.06496
2012	8359424201.99972
2013	7177117485.81919
2014	8824439588.79305
2015	3790231718.28521
2016	4984215459.65281
2017	6612731317.40322
2018	6015828987.09113
2019	3221695576.62412
2020	5667791246.76824
2021	9658640871.37568