Year	current US$
2002	492000000
2003	455000000
2004	512000000
2005	412000000
2006	433000000
2007	526000000
2008	621000000
2009	646000000
2010	800000000
2011	964000000
2012	1083000000
2013	1135000000
2014	1254000000
2015	1326000000
2016	1404000000
2017	1600000000
2018	1837000000
2019	1922000000
2020	845000000