Year	current US$
2005	459000000
2006	528000000
2007	605000000
2008	685000000
2009	486000000
2010	623000000
2011	489000000
2012	491000000
2013	200000000
2014	259000000
2015	267000000
2016	915000000
2017	1042000000
2018	1473000000
2019	1244000000
2020	599000000