Year	current US$
1970	2150000.09536743
1971	1880000.0138580753
1972	4459999.827668068
1973	4710000.07539988
1974	4599999.90463257
1975	3460000.0753998803
1976	1580000.04291534
1977	3320000.0394135714
1978	8009999.930858608
1979	12640000.186860565
1980	26640000.0602007
1981	31170000.17315154
1982	19290000.02145767
1983	14259999.841451652
1984	16159999.875351783
1985	16989999.700337656
1986	23580000.713467598
1987	23339999.862015236
1988	34710000.06794929
1989	40800000.25033954
1990	68300001.17421155
1991	54670000.61273575
1992	43839999.5267391
1993	40170000.10609628
1994	105719999.99880794
1995	165049998.730421
1996	150230000.64492226
1997	147050004.05758625
1998	126900001.46627428
1999	75220000.43094152
2000	51020001.61260365
2001	71700000.85979693
2002	21519999.80211259
2003	31919999.709352843
2004	98910001.11214809
2005	43819998.87526043
2006	80989999.47309494
2007	136840002.29835504
2008	250299997.80654907
2009	273979999.6614456
2010	263740001.26123446
2011	132409998.89373781
2012	119019999.69035394
2013	156879998.6541271
2014	123709997.75081885
2015	53970000.48309566
2016	115039997.6968765
2017	73359999.65667723
2018	109630001.36613838
2019	45729999.42302699
2020	55390000.40292747
2021	42960000.94152986
2022	36369999.57263471