Year	current US$
1970	0
1971	0
1972	0
1973	18204.1229922606
1974	143196.181529795
1975	44431.1779890892
1976	76433.7239284424
1977	212294.214362422
1978	259086.754509492
1979	341004.726534117
1980	367795.436277345
1981	4545.27969856683
1982	3074.74992770336
1983	12127.8562890185
1984	39185.9618168895
1985	21356.9599811847
1986	30443.6174722583
1987	49815.8285999788
1988	42999.5586452956
1989	8608.1187062645
1990	3807.18770337217
1991	20707.7136227962
1992	0
1993	0
1994	0
1995	2107587.69042888
1996	5979860.21671857
1997	0
1998	0
1999	0
2000	0
2001	580759.711435868
2002	1219548.77488001
2003	461406.661911859
2004	652708.824530135
2005	1047462.73183521
2006	2915683.86802945
2007	3298824.59518761
2008	4233424.58686295
2009	3380047.37682489
2010	2763546.10079044
2011	6379202.41892478
2012	7392397.44400728
2013	3983973.38988975
2014	5288001.19528521
2015	3367918.94145511
2016	3125208.98484407
2017	5623618.69354703
2018	0
2019	0
2020	0
2021	0