Year	current US$
2001	187000000
2002	194000000
2003	185000000
2004	268000000
2005	382000000
2006	347000000
2007	402000000
2008	536000000
2009	683000000
2010	802000000
2011	977000000
2012	1157000000
2013	960000000
2014	984000000
2015	1049000000
2016	1118000000
2017	954000000
2018	1522000000
2019	1400000000
2020	518000000