Year	current US$
1970	4939999.831840393
1971	8020000.135526056
1972	539999.9842047689
1973	1309999.9744445086
1974	7940000.183880335
1975	32379999.542608876
1976	22259999.593719833
1977	36739999.49544664
1978	39580000.467598446
1979	36250000.32596289
1980	57480000.62443313
1981	40919999.88630413
1982	69979999.51243404
1983	87930000.95710152
1984	57360000.60290095
1985	86490001.1010467
1986	151469999.19414517
1987	178089997.52625823
1988	318459998.883307
1989	486420001.59435034
1990	399529997.13458115
1991	356289996.7134001
1992	329029996.8831241
1993	374969996.07607734
1994	429969999.72872436
1995	522110006.2578914
1996	454530002.7802582
1997	301269999.4109572
1998	409570002.7495622
1999	417149997.60687345
2000	361080004.80756134
2001	249940000.956878
2002	201900000.13634554
2003	196030000.71831065
2004	279619996.4843688
2005	290940007.0440026
2006	1921499984.944237
2007	301100001.3146551
2008	353869997.0841411
2009	478480004.8395994
2010	689609999.4778638
2011	546210004.1508675
2012	555419997.7591633
2013	602400004.6625732
2014	412779999.8223779
2015	442419999.79689723
2016	302559996.4223802
2017	455870002.09093076
2018	326519997.6712464
2019	363439999.6846914