Year	current US$
1990	1900000
1994	125000000
1996	182000000
1997	405000000
1998	301600000
1999	466700000
2000	96400000
2001	350800000
2002	719170000
2003	579140000
2004	1141400000
2005	1526510000
2006	10028470000
2007	3924920000
2008	5254040000
2009	4871750000
2010	15494800000
2011	17667500000
2012	22034800000
2013	5136400000
2014	2931650000
2015	2047220000
2016	2623120000
2017	3482900000
2018	6607520000
2019	6469840000
2020	1861860000
2021	5823310000
2022	9271640000