Year	current US$
1970	11897324.6215861
1971	13397581.8156632
1972	16240836.221069
1973	24656815.1526702
1974	25405939.4340199
1975	29083205.5709405
1976	31660256.9549801
1977	28228781.5502131
1978	33888392.3547443
1979	40001769.8392241
1980	45474332.6694114
1981	36669802.6745727
1982	37845604.6045964
1983	34421656.7564006
1984	29785178.1997988
1985	34586499.2190899
1986	42445064.5925278
1987	49398263.3236775
1988	55382369.6042742
1989	73260361.9134826
1990	88559205.2620875
1991	59132076.0340073
1992	54592284.8130671
1993	56945176.527865
1994	57061489.3709466
1995	60873439.915646
1996	63093570.9335399
1997	51504890.6601162
1998	60512977.5885548
1999	58939324.6807325
2000	58232432.7610454
2001	49709685.9565145
2002	61080942.7739871
2003	69000976.7517075
2004	58570951.8542277
2005	60445396.5985012
2006	72454054.8534724
2007	89819425.9911717
2008	94995028.2150463
2009	83684288.8195267
2010	92845837.8705503
2011	91827806.853717
2012	75817491.9889832
2013	75576959.9300464
2014	70479829.0020961
2015	51752720.3872813
2016	51341424.1320865
2017	47947507.3580418
2018	58192855.0036415
2019	44997272.274364
2020	40071865.2091349
2021	44608340.8716799