Year	current US$
1994	87500000
1995	285000000
1998	20000000
1999	674000000
2000	577300000
2001	265000000
2002	421800000
2003	95000000
2005	42500000
2010	30000000
2011	365700000
2012	190000000
2014	277000000
2015	204500000
2017	125000000
2018	166050000
2019	78000000
2021	45000000
2022	310000000