Year	current US$
1970	1066579.5309983
1971	1078421.71063628
1972	965018.538994174
1973	1702139.71449807
1974	1179071.42034574
1975	2142076.90533246
1976	2028737.32903401
1977	2244007.1687094
1978	2037385.57820718
1979	2948223.21612295
1980	3460338.75797565
1981	3163113.8554857
1982	2998876.95889124
1983	1937069.9898199
1984	1125169.4078871
1985	987837.381982836
1986	1458793.30287873
1987	1721813.38861576
1988	1146319.57402469
1989	2474551.8848611
1990	1957181.57571014
1991	1826615.30773232
1992	2424603.65625301
1993	2370336.15580899
1994	3019456.85701074
1995	5164342.67818408
1996	2697428.64742503
1997	2583519.39285729
1998	1213399.27657942
1999	1153500.41214379
2000	1595533.53692974
2001	1591104.60922053
2002	1685617.41847033
2003	1891614.56395442
2004	1525647.28197139
2005	1926036.4290864
2006	2640612.88469208
2007	3247456.6373643
2008	3192951.32480615
2009	3212650.17640955
2010	5860584.78563252
2011	5642145.53559549
2012	5535430.40552532
2013	6138385.33764623
2014	13228533.0047003
2015	14598836.6927198
2016	14351051.3487276
2017	15471683.7265361
2018	16408635.3288021
2019	13786885.4460816
2020	14791080.4682083
2021	13282239.0719703