Year	current US$
1997	47000000
1998	188000000
1999	118000000
2000	97000000
2001	117000000
2002	126000000
2003	147000000
2004	177000000
2005	241000000
2006	313000000
2007	384000000
2008	447000000
2009	476000000
2010	659000000
2011	955000000
2012	1411000000
2013	1720000000
2014	1787000000
2015	1868000000
2016	2111000000
2017	2704000000
2018	3222000000
2019	3269000000
2020	542000000