Year	current US$
1970	0
1971	0
1972	0
1973	0
1974	0
1975	0
1976	0
1977	0
1978	2111.23710197079
1979	22981.6401697959
1980	775128.320022378
1981	838677.514046092
1982	476815.235588724
1983	675385.447134293
1984	649196.192419964
1985	504416.811109599
1986	620933.319200421
1987	629726.950587456
1988	810819.668177023
1989	428475.704676509
1990	1412097.95051421
1991	2127096.34333363
1992	2487334.82981457
1993	2278755.96261115
1994	21253501.1531402
1995	8219591.99267263
1996	11766734.0355339
1997	27945802.9718261
1998	28787706.2894645
1999	21685196.8595462
2000	43252550.7129543
2001	59178714.8848192
2002	141467657.886081
2003	42013845.0070462
2004	32993125.6623493
2005	0
2006	238751871.030417
2007	273422903.707233
2008	252142098.302159
2009	399719472.909302
2010	396006625.147528
2011	626121728.507286
2012	834366746.319579
2013	529080673.950641
2014	413537469.703772
2015	367125661.649923
2016	565241185.177443
2017	505151918.947261
2018	716472420.661342
2019	784916824.524157
2020	922587275.814204
2021	2400699106.63218