Year	current US$
1995	90000000
1996	96000000
1997	107000000
1998	131000000
1999	135000000
2000	128000000
2001	105000000
2002	108000000
2003	96000000
2004	93000000
2005	80000000
2006	126000000
2007	190000000
2008	360000000
2009	416000000
2010	383000000
2011	456000000
2012	447000000
2013	546000000
2014	578000000
2015	609000000
2016	511000000
2017	460000000
2018	620000000
2019	450000000