Year	U.S. dollars (Billions)
2002	1.481
2003	1.348
2004	1.915
2005	1.864
2006	1.444
2007	5.424
2008	3.477
2009	5.018
2010	4.510
2011	4.754
2012	2.205
2013	0.291
2014	1.350
2015	0.744
2016	1.627
2017	1.431
2018	2.227
2019	2.209
2020	2.814