Year	current US$
1999	29775461079.806793
2000	29004566602.359035
2001	27968592620.38538
2002	31254654070.8193
2003	35431025578.04693
2004	38979753165.613174
2005	44302503550.29819
2006	47510137170.604454
2007	55632440605.54976
2008	63824146965.46734
2009	54269909868.689926
2010	59923850520.74092
2011	67431256586.61983
2012	66996265799.56616
2013	67434193512.95126
2014	64990655017.947525
2015	55263842568.19635
2016	55891437345.8847
2017	61677046616.06442
2018	66378760223.591446
2019	64909883422.61394