Year	current US$
1970	16531043.1491661
1971	18699485.9976729
1972	24735490.7122511
1973	31957679.5328562
1974	45702419.4440293
1975	56349696.4135135
1976	60051254.898134
1977	58525340.0152537
1978	74267678.7283576
1979	92301311.2892581
1980	113479719.54084
1981	126249543.716935
1982	128216800.095484
1983	110469024.913824
1984	114651237.557059
1985	114678435.313867
1986	127421777.02251
1987	122591443.779687
1988	114599190.908995
1989	121179620.10208
1990	141838822.751991
1991	153025336.023769
1992	165198625.940687
1993	165029370.895337
1994	177306194.987262
1995	200125846.991177
1996	206736460.196442
1997	230713670.53484
1998	178623969.870791
1999	218926209.092341
2000	195854190.991534
2001	174668961.187353
2002	161222416.723629
2003	222431539.992409
2004	232156616.534556
2005	260190756.276968
2006	269953636.689698
2007	279538196.66393
2008	261048893.305408
2009	211350376.911126
2010	226904802.342076
2011	410508882.057653
2012	425580014.237931
2013	422114517.421789
2014	568514993.146874
2015	558328964.861146
2016	563483203.730834
2017	609591638.632095
2018	647504044.104609
2019	643585244.513237
2020	519628668.563092
2021	492888240.0744