Year	current US$
1970	12490000.167861592
1971	13459999.931976205
1972	20230000.309646133
1973	23410000.01691282
1974	35650000.156834684
1975	46089998.67737298
1976	48980000.53130091
1977	71519997.70663673
1978	72230000.14200808
1979	90919999.88816676
1980	105849996.90391114
1981	85179999.54335392
1982	91379998.99312854
1983	105240001.13457444
1984	85610000.2601743
1985	95599999.84875327
1986	140710001.43513086
1987	174789998.6375123
1988	208859995.81217775
1989	223579999.25315377
1990	241800002.77608648
1991	239539995.5883621
1992	252339997.35862014
1993	256320001.2501329
1994	267989999.92944294
1995	279170000.7710606
1996	336189999.68655413
1997	286750000.6537885
1998	327069995.17418456
1999	331840000.21219265
2000	304490000.19952667
2001	295059997.3350763
2002	258339999.34233725
2003	297580000.8177758
2004	341579998.37398523
2005	375270006.5672397
2006	440579996.2263554
2007	503819996.06639117
2008	516919999.96639824
2009	559110001.0126824
2010	511500006.768852
2011	579979998.6667928
2012	473350002.05598736
2013	421299996.2922186
2014	403410002.76431453
2015	256969997.88284302
2016	270369997.3449111
2017	264760000.4225969
2018	233480001.38998026
2019	306100001.2904406