Year	current US$
1995	78000000
1996	117000000
1997	135000000
1998	144000000
1999	151000000
2000	165000000
2001	165000000
2002	171000000
2003	184000000
2004	267000000
2005	380000000
2006	346000000
2007	398000000
2008	498000000
2009	667000000
2010	784000000
2011	960000000
2012	1135000000
2013	939000000
2014	965000000
2015	1037000000
2016	1102000000
2017	941000000
2018	1506000000
2019	1385000000
2020	504000000