Year	current US$
1970	57870000.01966954
1971	71779999.85590582
1972	88000001.24424703
1973	81480000.4716964
1974	101689998.61180776
1975	147420001.68748194
1976	131950000.41276221
1977	161160000.90539458
1978	257099999.077618
1979	363080005.7481975
1980	426359996.4026362
1981	373890002.5095789
1982	296939997.5165725
1983	248949997.85535052
1984	222540001.88224015
1985	274150001.1794267
1986	279000002.27242714
1987	363800001.70879054
1988	507249993.8961119
1989	476000000.3539026
1990	463440003.0039252
1991	565880012.5103444
1992	585219997.5810947
1993	408770001.67220837
1994	569209999.6060133
1995	557220004.1785835
1996	565790008.0494583
1997	558359998.8594651
1998	686460001.0402509
1999	630869994.5453556
2000	1014840008.4376336
2001	1071640008.6488576
2002	861410001.7994643
2003	1363789999.1385636
2004	2201619991.6899204
2005	1749460008.4871058
2006	2150990012.7686567
2007	2317970015.6040487
2008	2572450008.137152
2009	2563890036.7710724
2010	2595720018.913969
2011	3343889978.4386163
2012	3040610014.60813
2013	3547159995.308145
2014	3804220043.823122
2015	3811510020.0977197
2016	3174560014.0541787
2017	3318100062.3963776
2018	3187240023.855119
2019	3457870001.77242
2020	2942999988.641592
2021	1898070004.045965
2022	1475880001.6101458