Year	current US$
1995	75000000
1996	73000000
1997	98000000
1998	75000000
1999	127000000
2000	136000000
2001	66000000
2002	19000000
2003	12000000
2004	39000000
2005	74000000
2006	148000000
2007	212000000
2008	254000000
2009	133000000
2010	148000000
2011	180000000
2012	159000000
2013	166000000
2014	113000000
2015	146000000
2016	594000000
2017	977000000
2018	555000000
2019	469000000
2020	615000000