Year	current US$
1960	264600388.08056918
1961	130993525.45717067
1962	58146751.94856952
1963	43446730.388537906
1964	46386734.70054422
1965	132300194.04028459
1966	124133515.39582258
1967	77746780.69527835
1968	117273505.33447449
1969	373707214.77058166
1970	163660240.0350187
1971	60938452.16331505
1972	-68095827.85374719
1973	431787765.0583425
1974	22433941.39008179
1975	42055296.46902065
1976	1154402289.9186528
1977	986477377.8553706
1978	910173476.9922135
1979	1882617862.3879452
1980	612802801.0692352
1981	-1546357076.9815006
1982	-2335368109.507954
1983	-1505654281.098546
1984	647709846.4697254
1985	1601261678.2156725
1986	1690528007.2145724
1987	4463339574.97069
1988	3600145563.798146
1989	2355988278.3861146
1990	899856740.1451083
1991	-1798807099.214431
1992	802607295.7160246
1993	-66819600.67518876
1994	-1194177716.8114617
1995	-3490430622.009569
1996	1397169886.3184674
1997	913833487.1176095
1998	15873420301.671423
1999	19828157894.736843
2000	18019473684.210526
2001	16181842105.263159
2002	17400263157.894737
2003	21700789473.68421
2004	25414473684.21053
2005	31496198138.307705
2006	35456849546.79123
2007	38460318905.598694
2008	51542148542.80775
2009	41006916436.161354
2010	40588161698.209335
2011	46400608103.97898
2012	33828012876.193707
2013	27598385100.934364
2014	31354839498.175907
2015	22683943183.627987
2016	20039192525.307407
2017	21917407075.227867
2018	24065106452.580215
2019	27486823561.788013
2020	21488160291.87231
2021	27025077866.770287
2022	29454594822.67165
2023	19956073727.661697