Year	current US$
2002	1753000000
2003	1345000000
2004	1062000000
2005	1156000000
2006	1428000000
2007	1674000000
2008	3247000000
2009	1592000000
2010	2037000000
2011	2398000000
2012	2284000000
2013	2605000000
2014	2581000000
2015	2508000000
2016	2366000000
2017	2656000000
2018	2857000000
2019	3141000000
2020	327000000