Year	current US$
1995	214000000
1996	219000000
1997	190000000
1998	193000000
1999	201000000
2000	200000000
2001	180000000
2002	154000000
2003	215000000
2004	255000000
2005	268000000
2006	320000000
2007	237000000
2008	307000000
2009	291000000
2010	309000000
2011	333000000
2012	339000000
2013	384000000
2014	397000000
2015	368000000
2016	408000000
2017	472000000
2018	518000000
2019	530000000
2020	127000000