Year	current US$
2010	1171104960.87656
2011	1812073261.10434
2012	3953149069.74905
2013	4080474028.52898
2014	4196475037.35443
2015	3731400195.83704
2016	2900374346.18863
2017	4680606528.67408
2018	5825950245.05225
2019	5229246224.60837
2020	3951732998.90471