Year	current US$
1975	150000.005960464
1976	1000000
1977	6370000.00476837
1978	2699999.9880790687
1979	7430000.133812433
1980	14169999.718666071
1981	18120000.392198563
1982	11890000.045299526
1983	20529999.643564224
1984	13710000.067949295
1985	9199999.926611776
1986	14860000.103712078
1987	54159999.51958648
1988	31229999.63164331
1989	11710000.127553947
1990	12100000.001490112
1991	19130000.13120473
1992	30879999.784752756
1993	27569999.69482423
1994	14680000.007152556
1995	13629999.995231628
1996	13200000.107288364
1997	9259999.80419875
1998	7390000.004321341
1999	4820000.164210792
2000	52239998.459815994
2001	45000000.80466266
2002	14100000.37029386
2003	19260000.22888185
2004	39699999.2132187
2005	60750000.23841858
2006	46800000.74952844
2007	28640000.149607696
2008	43690000.17642974
2009	35880000.501871146
2010	50149999.42481513
2011	54509998.81327147
2012	37600000.20265578
2013	37320000.22009016
2014	40479999.01510775
2015	56159999.64252117
2016	37419999.54357733
2017	60650000.27418139
2018	54499999.5231628
2019	43630000.53167345
2020	57109999.56727023
2021	27879999.741911888
2022	30990000.087767825