Year	current US$
2009	814810144.746795
2010	4741674501.99103
2011	13151320164.8421
2012	15677314265.7485
2013	15764005777.4069
2014	13571591497.4082
2015	13883808863.5485
2016	9513690001.67727
2017	9292989765.5251
2018	11346432325.4429
2019	14200492446.3686