Year	current US$
1998	247000000
1999	245000000
2000	233000000
2001	265000000
2002	288000000
2003	377000000
2004	481000000
2005	519000000
2006	607000000
2007	724000000
2008	825000000
2009	674000000
2010	589000000
2011	635000000
2012	615000000
2013	685000000
2014	707000000
2015	752000000
2016	830000000
2017	930000000
2018	1096000000
2019	1173000000
2020	426000000