Year	current US$
1990	1900000
1994	125000000
1996	182000000
1997	523700000
1998	301600000
1999	706700000
2000	96400000
2001	350800000
2002	750970000
2003	579140000
2004	1158400000
2005	1590510000
2006	10068470000
2007	4505620000
2008	5557040000
2009	4871750000
2010	17172800000
2011	18167500000
2012	22034800000
2013	5136400000
2014	2931650000
2015	2397220000
2016	2623120000
2017	3782480000
2018	6607520000
2019	7619100000
2020	2722860000
2021	6473310000
2022	9649170000