Year	current US$
1995	20000000
1996	215000000
1997	192000000
1998	182000000
1999	118000000
2000	131000000
2001	119000000
2002	161000000
2003	222000000
2004	267000000
2005	341000000
2006	480000000
2007	671000000
2008	801000000
2009	724000000
2010	639000000
2011	771000000
2012	744000000
2013	865000000
2014	953000000
2015	895000000
2016	899000000
2017	951000000
2018	1057000000
2019	1016000000
2020	430000000