Year	current US$
1970	839999.973773956
1971	219999.998807907
1972	930000.007152557
1973	2839999.91416931
1974	4710000.03814697
1975	129999.995231628
1976	1860000.01430511
1977	5599999.90463257
1978	10449999.8092651
1979	3180000.0667572
1980	4539999.96185303
1981	7420000.07629395
1982	7230000.01907349
1983	5340000.15258789
1984	720000.028610229
1985	6230000.01907349
1986	5840000.15258789
1987	6579999.92370605
1988	5420000.07629395
1989	19049999.237060502
1990	29399999.6185303
1991	6969999.79019165
1992	6219999.79019165
1993	10180000.3051758
1994	13850000.3814697
1995	18920000.0762939
1996	13890000.3433228
1997	21770000.4577637
1998	66660003.662109405
1999	16090000.152587902
2000	36080001.8310547
2001	9119999.88555908
2002	21989999.7711182
2003	54259998.3215332
2004	68510002.1362305
2005	43709999.0844727
2006	211429992.67578098
2007	76860000.6103516
2008	130250000
2009	74260002.1362305
2010	53360000.6103516
2011	94330001.8310547
2012	64519996.643066406
2013	172330001.831055
2014	213350006.10351598
2015	141529998.779297
2016	162089996.33789098
2017	177509994.506836
2018	196169998.168945
2019	126639999.38964799
2020	133020004.272461
2021	153240005.493164
2022	142740005.493164