Year	current US$
1995	346000000
1996	326000000
1997	267000000
1998	259000000
1999	267000000
2000	281000000
2001	256000000
2002	245000000
2003	486000000
2004	640000000
2005	683000000
2006	738000000
2007	749000000
2008	761000000
2009	755000000
2010	801000000
2011	731000000
2012	693000000
2013	700000000
2014	705000000
2015	122000000
2016	175000000
2017	135000000
2018	145000000
2019	179000000
2020	51000000