Year	current US$
1995	4791000000
1996	4735000000
1997	3752000000
1998	2246000000
1999	2870000000
2000	3218000000
2001	3334000000
2002	3888000000
2003	3538000000
2004	5343000000
2005	4920000000
2006	6176000000
2007	6889000000
2008	6707000000
2009	5744000000
2010	7155000000
2011	7534000000
2012	8095000000
2013	8238000000
2014	8824000000
2015	9539000000
2016	11267000000
2017	12676000000
2018	14406000000
2019	14969000000
2020	3681000000