Year	current US$
2001	1417000000
2002	663000000
2003	655000000
2004	881000000
2005	1036000000
2006	1314000000
2007	1354000000
2009	1257000000
2010	1287000000
2011	1364000000
2012	1206000000
2013	1150000000
2014	1331000000
2015	1110000000
2016	1136000000
2017	1240000000
2018	1439000000
2019	1681000000
2020	844000000