Year	current US$
1971	1229999.994859099
1972	3509999.9085068684
1973	4979999.98182058
1974	9550000.060349705
1975	15630000.481382037
1976	21459999.879822142
1977	17239999.95179475
1978	18400000.147521496
1979	24569999.618455738
1980	31879999.799653914
1981	32930000.27537342
1982	37810000.0526756
1983	45610000.420361824
1984	47610000.11675057
1985	52760001.67243179
1986	88320001.37120478
1987	115789999.54462054
1988	181940000.59925014
1989	174689998.04928905
1990	177580001.06737006
1991	182820000.99681324
1992	134669999.68513837
1993	57919999.29212037
1994	68240000.30010949
1995	59520000.2677739
1996	59579999.17492268
1997	52060000.01169741
1998	58069999.793544374
1999	61809999.709948905
2000	57220000.31732021
2001	62950000.26188795
2002	70689999.96222545
2003	91669999.29398297
2004	114100000.5137175
2005	128359998.31371008
2006	157280000.56557345
2007	204030000.76301402
2008	214500002.37673518
2009	245430002.53289935
2010	262359995.93138686
2011	253619999.40127125
2012	229700002.6162715
2013	238680000.21390605
2014	264869999.29137525
2015	180260000.86963183
2016	136199999.02509162
2017	110560000.00052153
2018	105750000.3334135
2019	131760000.10780984
2020	146700000.53197148
2021	161819998.8845736
2022	137389999.21642247