Year	current US$
1992	5023150000
1993	2494840000
1994	2075679999.9999998
1995	2135199999.9999998
1996	2029790000
1997	3080500000
1998	2092300000.0000002
1999	1654800000
2000	1972900000
2001	945500000
2002	111830000
2003	104040000
2004	274000000
2005	248600000
2006	1928000000
2007	489000000
2008	717750000
2009	344250000
2010	322910000
2011	564600000
2012	593000000
2013	1039000000
2015	120000000
2017	1826100000
2018	1151820000
2019	2060400000
2020	160000000
2022	516000000