Year	current US$
1995	47000000
1996	58000000
1997	83000000
1998	81000000
1999	99000000
2000	186000000
2001	168000000
2002	256000000
2003	58000000
2004	49000000
2005	139000000
2006	209000000
2007	337000000
2008	958000000
2009	791000000
2010	736000000
2011	688000000
2012	638000000
2013	616000000
2014	605000000
2015	461000000
2016	1088000000
2017	2615000000
2018	1977000000
2019	1471000000
2020	321000000