Year	current US$
1990	8618300000
1991	3424300000
1992	3631600000
1993	4465000000
1994	6215200000
1995	6538820000
1996	14037520000
1997	14560140000
1998	13901100000
1999	5805960000
2000	6889300000
2001	3973030000
2002	2484810000
2003	6665150000
2004	2937090000
2005	14160720000
2006	19408900000
2007	20945080000
2008	17057490000
2009	15952730000
2011	13370820000
2012	31678340000
2013	26183660000
2014	49248940000
2015	60712740000
2016	13748570000
2017	27448020000
2018	40998100000
2019	31738370000
2020	5759780000
2021	30367560000
2022	42082050000