Year	current US$
1995	54000000
1996	53000000
1997	48000000
1998	73000000
1999	126000000
2000	81000000
2001	200000000
2002	225000000
2003	297000000
2004	338000000
2005	387000000
2006	420000000
2007	538000000
2008	820000000
2009	607000000
2010	676000000
2011	897000000
2012	842000000
2013	684000000
2014	817000000
2015	753000000
2016	852000000
2017	1036000000
2018	1011000000
2019	926000000
2020	396000000