Year	current US$
1995	76000000
1996	79000000
1997	78000000
1998	83000000
1999	88000000
2000	93000000
2001	83000000
2002	91000000
2003	104000000
2004	86000000
2005	71000000
2006	94000000
2007	129000000
2008	127000000
2009	112000000
2010	112000000
2011	117000000
2012	122000000
2013	120000000
2014	388000000
2015	422000000
2016	437000000
2017	482000000
2018	522000000
2019	527000000
2020	195000000