Year	current US$
1995	137000000
1996	162000000
1997	204000000
1998	203000000
1999	206000000
2000	211000000
2001	148000000
2002	136000000
2003	153000000
2004	199000000
2005	269000000
2006	287000000
2007	274000000
2008	277000000
2009	198000000
2010	209000000
2011	220000000
2012	288000000
2013	283000000
2014	179000000
2015	218000000
2016	162000000
2017	116000000
2018	80000000
2019	49000000
2020	15000000