Year	current US$
1970	168044.837243553
1971	184404.21910367
1972	152878.069209621
1973	186725.022758691
1974	3726670.42369353
1975	4901020.95441918
1976	2173108.31035998
1977	4825019.6834168
1978	1131216.24180583
1979	1193028.36707845
1980	2375935.26367013
1981	2958198.6528503
1982	3001574.90820036
1983	2391739.2111388
1984	1783845.19876128
1985	2354953.36287834
1986	1712850.17002061
1987	1597410.09647799
1988	1389329.36804085
1989	1960705.85052057
1990	2633106.67120982
1991	1756618.42971343
1992	2306197.84204075
1993	1476468.18182343
1994	3011392.27988401
1995	1472235.37497109
1996	3222696.66295501
1997	1491378.46528452
1998	4589641.21015729
1999	3086284.35259372
2000	1538932.33691401
2001	2750440.32852912
2002	1663337.88972087
2003	1353628.45214807
2004	1056901.76486489
2005	4329073.95969634
2006	16523737.8462274
2007	56407264.7107074
2008	813207382.70003
2009	836266186.585844
2010	182356758.138895
2011	580037515.968819
2012	912566324.502545
2013	313197432.237772
2014	183914729.534093
2015	130855660.57398
2016	261492614.38976
2017	275430282.6294
2018	18425342.3271923
2019	0
2020	0
2021	0