Year	current US$
1998	1686000000
1999	1850000000
2000	2330000000
2001	2019000000
2002	2439000000
2003	1932000000
2004	2956000000
2005	3409000000
2006	4032000000
2007	4671000000
2008	5218000000
2009	4313000000
2010	5519000000
2011	6131000000
2012	5893000000
2013	6318000000
2014	6877000000
2015	6696000000
2016	6440000000
2017	6461000000
2018	7045000000
2019	6326000000