Year	current US$
2007	660000000
2008	859000000
2009	792000000
2010	765000000
2011	926000000
2012	860000000
2013	929000000
2014	959000000
2015	947000000
2016	978000000
2017	1110000000
2018	1224000000
2019	1276000000
2020	180000000