Year	current US$
1970	3479999.9725073543
1971	2659999.9945610785
1972	2840000.0054389145
1973	3890000.0471621715
1974	5820000.000298025
1975	9070000.050589442
1976	7129999.969154596
1977	3670000.143349172
1978	12369999.993592504
1979	10260000.061243773
1980	14169999.673962587
1981	10129999.90023673
1982	2409999.9591708174
1983	12560000.304132715
1984	6140000.108629462
1985	6310000.065714114
1986	9849999.923259016
1987	2950000.025331972
1988	12279999.971389776
1989	7400000.106543298
1990	15719999.976456152
1991	170799993.8037243
1992	25309999.600052856
1993	15230000.102892505
1994	4850000.116974117
1995	13430000.018328426
1996	8090000.076219445
1997	8010000.0444799615
1998	1430000.0835209992
1999	3990000.1678615757
2000	5879999.967291944
2001	1799999.982118615
2002	1400000.1084059486
2003	4239999.804645776
2004	12489999.994635578
2005	15040000.14066695
2006	16110000.04410744
2007	-600000.0834465008
2008	4670000.389218331
2009	1430000.0071525574
2010	1169999.6590614393
2011	760000.0202655802
2012	489999.94993210444
2013	759999.7911602352
2014	450000.0327825588
2015	5950000.125914805
2016	68400003.1147152
2017	8619999.933987858
2018	10669999.960809939
2019	9560000.05826354
2020	11640000.261366362
2021	14960000.38832423
2022	14829999.566078216