Year	current US$
1970	15159280.1925543
1971	14174509.3337455
1972	17455659.7877875
1973	28799023.0244003
1974	30217712.7150679
1975	36943181.6968764
1976	32300990.1379495
1977	42261588.7575447
1978	44079816.7569871
1979	61316716.7366588
1980	68612951.9338369
1981	62875041.9987017
1982	105836448.278657
1983	54985288.6228098
1984	31847484.2552326
1985	30817766.3909382
1986	34449991.3700497
1987	41587286.2846297
1988	39023988.2960657
1989	44392144.7658833
1990	55270417.6755625
1991	61101020.9016682
1992	63917580.8064308
1993	73536779.8737157
1994	90179287.0265182
1995	129447129.661271
1996	114415123.249552
1997	121158790.511811
1998	87698889.2231467
1999	80907749.8116132
2000	56959001.190168
2001	60467406.0898306
2002	60078278.7814533
2003	70635814.6496648
2004	80475505.7705919
2005	88343279.5613909
2006	139090887.318731
2007	155952625.059272
2008	163428117.262646
2009	160751363.689616
2010	271880505.630031
2011	249247367.868904
2012	239785092.756218
2013	292566703.522119
2014	276445692.504512
2015	231065355.103548
2016	247431549.866864
2017	234999623.359054
2018	207309497.013286
2019	178798790.926928
2020	211557553.476333
2021	178855019.017774