Year	current US$
1995	3982000000
1996	4988000000
1997	6208000000
1998	6019000000
1999	3551000000
2000	4548000000
2001	3765000000
2002	2929000000
2003	2874000000
2004	3752000000
2005	5905000000
2006	7501000000
2007	10434000000
2008	13269000000
2009	12897000000
2010	18883000000
2011	24608000000
2012	26008000000
2013	29286000000
2014	29998000000
2015	20356000000
2016	17068000000
2017	22991000000
2018	22229000000
2019	21178000000
2020	6490000000