Year	current US$
1999	140000000
2000	122000000
2001	132000000
2002	115000000
2003	141000000
2004	140000000
2005	187000000
2006	196000000
2007	209000000
2008	241000000
2009	247000000
2010	247000000
2011	264000000
2012	247000000
2013	313000000
2014	331000000
2015	322000000
2016	290000000
2017	237000000
2018	135000000
2019	99000000
2020	95000000