Year	current US$
1972	9960000.03814697
1973	6280000.20980835
1974	589999.973773956
1975	16370000.839233398
1976	21979999.5422363
1977	40409999.8474121
1978	41639999.3896484
1979	36740001.6784668
1980	13210000.038146999
1981	27959999.084472697
1982	44069999.6948242
1983	35430000.3051758
1984	71809997.55859381
1985	26200000.762939498
1986	40009998.3215332
1987	59439998.626709
1988	53090000.1525879
1989	58349998.4741211
1990	51189998.626709
1991	47580001.8310547
1992	76550003.0517578
1993	25000000
1994	67000000
1995	40740001.6784668
1996	3430000.0667572
1997	39580001.8310547
1998	16079999.923706101
1999	23110000.6103516
2000	8920000.07629395
2001	23530000.6866455
2002	25409999.8474121
2003	16120000.839233398
2004	9939999.5803833
2005	18180000.3051758
2006	5070000.17166138
2007	11600000.3814697
2008	9630000.11444092
2009	21889999.3896484
2010	19389999.3896484
2011	9920000.07629395
2012	10358779.9072266
2013	6204455.852508539
2014	5614349.8420715295
2015	3100733.0417633103
2016	1110893.01109314
2017	636730.015277863
2018	11555230.140686
2019	7921649.93286133
2020	3050882.8163147
2021	4574659.82437134
2022	1181495.42808533