Year	current US$
2008	2280877922.82312
2009	1889341068.49078
2010	2564102564.10256
2011	2249916359.98662
2012	2377288135.59322
2013	3398305084.74576
2014	3161245457.62712
2015	11458853559.7359
2016	1176994256.26803