Year	current US$
1995	74000000
1996	59000000
1997	61000000
1998	145000000
1999	151000000
2000	162000000
2001	165000000
2002	184000000
2003	216000000
2004	270000000
2005	472000000
2006	575000000
2007	816000000
2008	870000000
2009	948000000
2010	882000000
2011	1026000000
2012	976000000
2013	982000000
2014	947000000
2015	1405000000
2016	1571000000
2017	1581000000
2018	1329000000
2019	1380000000
2020	946000000