Year	current US$
1995	47000000
1996	36000000
1997	21000000
1999	53000000
2000	43000000
2001	61000000
2002	96000000
2003	76000000
2004	94000000
2005	119000000
2006	93000000
2007	137000000
2008	170000000
2009	1347000000
2010	1379000000
2011	1456000000
2012	1455000000
2013	1349000000
2014	1669000000
2015	1882000000
2016	2084000000
2017	2264000000
2018	2773000000
2019	2727000000
2020	1178000000