Year	current US$
1995	98000000
1996	85000000
1997	286000000
1998	423000000
1999	574000000
2000	495000000
2001	572000000
2002	654000000
2003	689000000
2004	789000000
2005	920000000
2006	915000000
2007	1010000000
2008	1339000000
2009	1683000000
2010	2184000000
2012	2654000000
2013	2598000000
2014	1325000000
2015	1066000000
2016	813000000
2017	2005000000
2018	2042000000