Year	current US$
1995	591000000
1996	601000000
1997	789000000
1998	634000000
1999	466000000
2000	654000000
2001	566000000
2002	533000000
2003	613000000
2004	881000000
2005	1185000000
2006	1737000000
2007	2223000000
2008	2307000000
2009	1999000000
2010	2918000000
2011	3806000000
2012	3969000000
2013	4258000000
2014	4431000000
2015	2999000000
2016	2571000000
2017	3989000000
2018	3963000000
2019	3585000000
2020	1096000000