Year	current US$
1995	145000000
1996	78000000
1997	92000000
1998	126000000
1999	147000000
2000	198000000
2001	204000000
2002	184000000
2003	230000000
2004	276000000
2005	282000000
2006	277000000
2007	281000000
2008	229000000
2009	232000000
2010	298000000
2011	316000000
2012	331000000
2013	262000000
2014	276000000
2015	256000000
2016	237000000
2017	253000000
2018	278000000
2019	291000000
2020	89000000