Year	current US$
1995	6000000
1996	16000000
1997	14000000
1998	2000000
1999	6000000
2000	3000000
2001	6000000
2002	240000000
2003	278000000
2004	309000000
2005	388000000
2006	382000000
2007	526000000
2008	704000000
2009	698000000
2010	915000000
2011	780000000
2012	610000000
2013	625000000
2014	678000000
2015	666000000
2016	909000000
2017	1061000000
2018	576000000