Year	current US$
1971	1749999.9999999993
1972	4289999.922737477
1973	6290000.012144443
1974	10340000.072494151
1975	16830000.49553814
1976	24309999.857097868
1977	21609999.8857826
1978	20070000.11391938
1979	27499999.59394333
1980	39359999.654814616
1981	42970000.542700246
1982	51070000.18469989
1983	64520000.712946124
1984	77789999.66941765
1985	87760001.88104805
1986	125610001.4541297
1987	168999999.4635582
1988	257380000.80548215
1989	269249999.50081116
1990	265209999.92825064
1991	286829999.6461721
1992	205460000.15549353
1993	92980000.05260113
1994	92980000.43258081
1995	89300000.5707145
1996	81079998.88435005
1997	69860000.3924221
1998	82449999.48143953
1999	80519999.8822063
2000	80180000.44487415
2001	84700000.09983784
2002	91960000.17039467
2003	114829999.37981366
2004	142060000.24825332
2005	176839998.409152
2006	205440000.98295492
2007	261390001.00269923
2008	279740001.6821921
2009	338350003.94657254
2010	364119997.249916
2011	346239998.9757686
2012	329940003.7694723
2013	359899999.9258667
2014	411269999.38488
2015	283880001.468584
2016	237879999.71024713
2017	194949998.93568453
2018	168910001.6597658
2019	210149999.94635576
2020	246239999.3259459
2021	245729998.90334913
2022	206919998.12424183