Year	current US$
1972	29999.999329447703
1973	9999.99977648258
1977	649999.976158142
1978	2599999.90463257
1979	3990000.00953674
1980	3950000.04768372
1981	12390000.3433228
1982	3369999.8855590797
1983	3089999.91416931
1984	5079999.92370605
1985	3289999.96185303
1986	5840000.15258789
1987	6949999.80926514
1988	4000000
1989	14460000.038146999
1990	7300000.19073486
1991	8020000.45776367
1992	8250000
1993	5710000.03814697
1994	39250000
1995	32439998.626709
1996	53159999.8474121
1997	74730003.3569336
1998	18420000.0762939
1999	5079999.92370605
2000	32810001.373291
2001	41040000.9155273
2002	15619999.8855591
2003	1539999.96185303
2004	58130001.0681152
2005	16219999.3133545
2006	32849998.4741211
2007	39490001.6784668
2008	80750000
2009	105900001.52587901
2010	106430000.30517599
2011	17159999.8474121
2012	11779999.7329712
2013	59849998.4741211
2014	63209999.0844727
2015	24430000.3051758
2016	17979999.5422363
2017	15920000.076293899
2018	38270000.4577637
2019	9130000.11444092
2020	25860000.6103516
2021	14350000.3814697
2022	15399999.6185303