Year	current US$
1970	22849999.157711864
1971	25729999.536648363
1972	31070000.380277608
1973	25340000.50276516
1974	45270000.76696282
1975	50979998.73012307
1976	108139997.02036363
1977	103699997.43066734
1978	100370000.18917027
1979	144350000.96820292
1980	151159997.15402725
1981	135620003.35939223
1982	128950003.64817677
1983	34539999.16650355
1984	33119999.857619416
1985	22230000.1718104
1986	34759999.599307775
1987	44659999.7226149
1988	53809999.03008345
1989	88699999.11822382
1990	107160001.26861042
1991	47690000.941976875
1992	93819999.96490772
1993	106169997.07557264
1994	95730000.14014545
1995	119789999.67873098
1996	145070001.81265178
1997	106410000.97058716
1998	76550001.03265043
1999	47820000.71369113
2000	46830000.48808755
2001	56719999.967142954
2002	30120000.302791607
2003	23009999.956935648
2004	56099999.755621
2005	59190000.66258021
2006	49739999.2160499
2007	149770000.69618186
2008	87570002.01940534
2009	123610002.04086258
2010	82830002.90393828
2011	55609998.166561104
2012	5869999.803602703
2013	3010000.038892028
2014	5449999.84651803
2015	7409999.72820282
2016	2900000.087916851
2017	-9999.968111517694
2018	2829999.8976290207
2019	3929999.9363720403
2020	4659999.8846650105
2021	2589999.906718733
2022	1200000.0439584209