Year	current US$
2001	160000000
2002	20000000
2006	3900000
2007	83400000
2008	100140000
2009	120690000
2010	88910000
2011	997800000
2012	1182500000
2017	24500000
2018	669220000
2019	1409010000
2020	15000000
2021	1451000000