Year	current US$
1970	6479262.70397008
1971	4158417.86283326
1972	4330240.36479997
1973	7653532.92277651
1974	24198827.411171
1975	17082545.2964104
1976	5576914.28101015
1977	20962172.8255152
1978	543435.109153248
1979	1387661.46647505
1980	9128270.62359182
1981	14600603.2752241
1982	9447103.09524518
1983	6066179.25730416
1984	0
1985	3131901.93680062
1986	0
1987	0
1988	0
1989	0
1990	0
1991	0
1992	0
1993	0
1994	0
1995	0
1996	0
1997	0
1998	0
1999	0
2000	0
2001	0
2002	0
2003	0
2004	0
2005	0
2006	10193610.3148029
2007	25118677.3734527
2008	248963813.654344
2009	171069453.516668
2010	84179723.6895595
2011	157271013.20327
2012	265007380.886594
2013	150867443.254169
2014	102182039.52975
2015	135199396.593027
2016	154539554.052716
2017	72663555.8498131
2018	94256650.231464
2019	0
2020	0
2021	0