Year	current US$
2001	1700000000
2004	9000000
2005	3000000
2007	1000000000
2010	5187000000
2011	4795000000
2012	43000000
2014	262000000
2015	282000000
2016	207010000
2017	127300000
2018	188700000
2019	652310000
2020	486950000
2021	101020000