Year	current US$
1995	93000000
1996	65000000
1997	84000000
1998	118000000
1999	140000000
2000	134000000
2001	116000000
2002	43000000
2003	144000000
2004	286000000
2005	303000000
2006	372000000
2007	440000000
2008	475000000
2009	403000000
2010	456000000
2011	372000000
2012	419000000
2013	247000000
2014	346000000
2015	194000000
2016	241000000
2017	259000000
2018	230000000
2019	200000000
2020	69000000