Year	current US$
1996	6961500000
1997	8983100000
1998	7280700000
1999	4348550000
2001	3762200000
2002	3355970000
2003	2675120000
2005	5672850000
2006	9529350000
2007	16695740000
2008	18032830000
2009	32422460000
2010	45116140000
2011	28187497000
2012	25836150000
2013	9457660000
2014	13598935000
2015	12993820000
2016	8664710000
2017	20329810000
2018	9926020000
2019	10303620000
2020	15239240000
2021	10575140000
2022	12053820000