Year	current US$
1994	820800000
1995	520000000
1996	149300000
1997	8032500000
1998	942800000
1999	270500000
2000	4066000000
2001	672960000
2002	934050000
2003	703500000
2004	3132480000
2005	1340919000
2006	1147161030
2007	1901875470
2008	973613580
2009	539030000
2010	639700000
2011	591630000
2012	467260000
2013	309340000
2014	352820000
2015	774050000
2016	1527870000
2017	1583280000
2018	1960660000
2019	3599930000
2020	2312270000
2021	3682440000
2022	1216300000