Year	current US$
1995	1640000000
1996	1636000000
1997	1639000000
1998	1630000000
1999	1521000000
2000	1406000000
2001	1438000000
2002	1579000000
2003	1871000000
2004	2068000000
2005	2180000000
2006	2380000000
2007	2837000000
2008	3234000000
2009	2745000000
2010	3026000000
2011	3847000000
2012	3877000000
2013	4041000000
2014	3657000000
2015	2574000000
2016	2649000000
2017	3400000000
2018	3665000000
2019	3725000000
2020	1245000000