Year	current US$
1970	17299999.970942736
1971	18379999.65250493
1972	16580000.281333916
1973	8250000.005587944
1974	29569999.683648344
1975	26220000.01370906
1976	21299999.751150597
1977	13000000.284984717
1978	66159998.56218696
1979	47469999.29845332
1980	32729999.870061874
1981	28489999.67798594
1982	23019999.81887638
1983	18720000.21860003
1984	13039999.971166251
1985	16699999.989941722
1986	17220000.15713273
1987	19119999.948889017
1988	26750000.474974502
1989	35540000.058710545
1990	42260000.601410866
1991	38909999.484196275
1992	30739999.560639262
1993	29369999.606162306
1994	31829999.722540416
1995	17700000.025331974
1996	30269999.580457788
1997	160199998.6805023
1998	43729997.77272343
1999	62769999.234005824
2000	47940000.63650316
2001	34279998.81282449
2002	39819999.79913232
2003	21449999.83534217
2004	4030001.1001526047
2005	51779999.77767468
2006	22279999.47220084
2007	9390000.33587218
2008	12169999.856501814
2009	11430000.042542815
2010	6280000.083148483
2011	11879999.88161032
2012	19489999.54946337
2013	23050000.43474136
2014	13800000.131130174
2015	18239999.841898687
2016	10300000.24288893
2017	13370000.109076506
2018	14399999.480694504
2019	19899999.886751138
2020	17380000.30443069
2021	14799999.633803954
2022	6900000.0953674335