Year	current US$
2005	1569000000
2006	1680000000
2007	2232000000
2008	3081000000
2009	3351000000
2010	3733000000
2011	5248000000
2012	6221000000
2013	9987000000
2014	10476000000
2015	9032000000
2016	7762000000
2017	9515000000
2018	11571000000
2019	11586000000
2020	3551000000