Year	current US$
1999	806000000
2000	634000000
2001	677000000
2002	852000000
2003	709000000
2004	881000000
2005	786000000
2006	770000000
2007	1025000000
2008	1167000000
2009	1042000000
2010	861000000
2011	918000000
2012	962000000
2013	923000000
2014	865000000
2015	770000000
2016	954000000
2017	1410000000
2018	1741000000
2019	1811000000
2020	789687194.824219