Year	current US$
1978	2499381.065
1979	3088543.177
1980	3175887.108
1981	2653791.666
1982	2131696.224
1983	1609600.663
1984	1087505.221
1985	565409.7795
1986	43314.3079
1987	9982.1463
1988	4431787.491
1989	4404277.802
1990	4376768.112
1991	4349258.423
1992	4321748.734
1993	4294239.521
1994	4266729.832
1995	4239220.01993526
1996	7819335.34724702
1997	4574507.63474941
1998	1937446.49863673
1999	11666412.4196063
2000	10352873.0727615
2001	12119417.8945795
2002	1176490.49976873
2003	12388155.7326253
2004	14954054.8220439
2005	11379620.3626781
2006	13207621.661714
2007	16687081.7739817
2008	21717486.771713
2009	34089356.1430094
2010	33137005.1187299
2011	62226176.1618155
2012	68345052.9781772
2013	72057151.4560363
2014	41593306.5848079
2015	29796433.4266576
2016	7710018.0691236
2017	0
2018	0
2019	26242892.954918
2020	12632343.286696
2021	43959696.1855082
2022	2944824.90317009
2023	2944824.90317009