Year	current US$
1970	15285174.1070857
1971	17330555.6875079
1972	20622398.0554285
1973	27128776.6861078
1974	30182962.5415972
1975	48697557.6140469
1976	58107306.7544356
1977	48240766.0565046
1978	72526263.6894605
1979	82931246.0712308
1980	101916306.001945
1981	105355021.052257
1982	112628591.181274
1983	107123625.659453
1984	92999294.2886355
1985	136285092.982567
1986	126649532.477828
1987	157298122.094581
1988	128391384.403909
1989	136495290.700561
1990	156469073.203973
1991	153444687.440943
1992	172062117.65704
1993	205405295.350816
1994	104500809.258248
1995	101948232.949173
1996	86571871.7676892
1997	98831390.6216844
1998	76887667.6966804
1999	79932735.681278
2000	102982008.46904
2001	82174422.9790038
2002	83628637.7339802
2003	97674997.5321496
2004	105473035.942583
2005	127103569.877692
2006	172322314.986096
2007	185720400.381335
2008	257412971.300449
2009	225827211.693806
2010	307982689.372129
2011	355059456.091752
2012	421759132.930099
2013	442193590.155084
2014	458029472.735855
2015	297975378.355943
2016	247679081.498386
2017	240313883.834926
2018	323736960.352365
2019	285820306.428724
2020	224565830.273009
2021	322122671.623051