Year	current US$
1994	824300000
1995	475800000
1996	290300000
1997	410500000
1998	917000000
1999	551900000
2000	4935280000
2001	663190000
2002	1077370000
2003	1087120000
2004	3461890000
2005	1699663000
2006	1667761030
2007	2137378170
2008	1511956780
2009	521510000
2010	449100000
2011	495640000
2012	4980060000
2013	3245440000
2014	2095670000
2015	3814750000
2016	1461770000
2017	1669680000
2018	1868010000
2019	3799460000
2020	3641650000
2021	9339270000
2022	1502280000