Year	current US$
1995	662000000
1996	541000000
1997	517000000
1998	1150000000
1999	1184000000
2000	1364000000
2001	1262000000
2002	1392000000
2003	2051000000
2004	2796000000
2005	3063000000
2006	3317000000
2007	4181000000
2008	4852000000
2009	4273000000
2010	3807000000
2011	4297000000
2012	3975000000
2013	4410000000
2014	4518000000
2015	3568000000
2016	4148000000
2017	4663000000
2018	5061000000
2019	4832000000
2020	1792000000