Year	current US$
1970	211984.8049364
1971	2043263.23075206
1972	2323763.61907601
1973	3118302.64919853
1974	12651083.7751018
1975	30970551.2542457
1976	28730424.0634266
1977	28393437.7203143
1978	21997935.4389895
1979	32378441.823128
1980	52796380.0745383
1981	80827036.8464123
1982	87729661.7739373
1983	43520515.1233742
1984	34165427.0776272
1985	49042421.7391539
1986	17344547.7035766
1987	17091451.9170261
1988	13507768.4998429
1989	22716467.7133768
1990	34854001.2587006
1991	16088130.129543
1992	11222572.9370731
1993	2079403.15802992
1994	2829299.57116643
1995	8304911.00990099
1996	5172161.03195286
1997	2438112.37014041
1998	3443889.97492022
1999	1502412.42701638
2000	11011910.2960393
2001	17603455.0356459
2002	6975420.6636948
2003	7388108.6833262
2004	69120184.8217199
2005	50898383.5604413
2006	67641942.7253853
2007	88813844.1321801
2008	235111350.654305
2009	64284931.9509618
2010	128129943.690095
2011	236864211.641856
2012	117690284.321682
2013	65694551.187142
2014	47248905.229966
2015	27183228.7471486
2016	24478929.1472945
2017	36007846.9831529
2018	39207223.7941075
2019	28205449.2638342
2020	18286102.8009163
2021	46198269.7872108