Year	current US$
1995	70000000
1996	46000000
1997	162000000
1998	125000000
1999	81000000
2000	63000000
2001	43000000
2002	51000000
2003	58000000
2004	65000000
2005	78000000
2006	117000000
2007	178000000
2008	191000000
2009	379000000
2010	657000000
2011	1287000000
2012	2433000000
2013	2365000000
2014	2432000000
2015	2309000000
2016	2714000000
2017	3012000000
2018	2634000000
2019	1791500000
2020	304000000