Year	current US$
1994	100000000
1995	34800000
1996	302000000
1997	116700000
1999	36600000
2002	60000000
2006	43500000
2010	758000000
2011	24000000
2012	450000000
2013	523000000
2014	376700000
2015	127500000
2019	56400000