Year	current US$
1977	40492912.29
1978	68978424.07
1979	127889999.4
1980	262200012.20000002
1981	383991638.2
1982	133111251.8
1983	274461547.9
1984	284769226.1
1985	260808441.20000002
1986	113319999.7
1987	137817779.5
1988	217355560.3
1989	416733337.4
1990	61900001.53
1991	45400001.53
1992	123699996.9
1993	75199996.95
1994	107199996.9
1995	346200000
1996	221520000
1997	419600000
1998	686600000
1999	665100000
2000	640800000
2001	739600000
2002	977690000
2003	1223600000
2004	1402950000
2005	703788385.657612
2006	800828762.026369
2007	999710750.072104
2008	1590626089.41345
2009	1394395643.14033
2010	1455537377.36537
2011	824220909.259269
2012	595843243.828036
2013	619508803.404154
2014	506556821.863654
2015	151392010.452944
2016	153411466.260786
2017	212936009.907809
2018	425214350.607035
2019	522317287.755546
2020	495355092.526947
2021	1119019556.08389
2022	1499430935.49713
2023	1000000000