Year	current US$
1970	13220000.080764305
1971	19510000.30711293
1972	26159999.534487724
1973	30129999.542608857
1974	51399999.618530326
1975	17069999.75442886
1976	19190000.424161535
1977	31009999.573230736
1978	55429999.15778629
1979	49460000.891238466
1980	68989997.50614169
1981	131239998.45981601
1982	84839998.7220765
1983	112339999.55654141
1984	69209998.2500076
1985	96160000.68187714
1986	70539999.48501578
1987	128479998.46935268
1988	155639997.72071835
1989	153919998.88420105
1990	164000001.0728836
1991	606210014.7455926
1992	249200001.12056732
1993	456099993.94416857
1994	523930008.8882442
1995	368750002.861023
1996	638339993.9537053
1997	736860010.1470945
1998	905310018.4202197
1999	677960008.8000307
2000	459940003.9017202
2001	575759990.4537199
2002	425810000.0619888
2003	612159997.9400631
2004	942669999.5994565
2005	823839996.9935427
2006	1256570002.9730797
2007	1055940010.666848
2008	1067660000.5626686
2009	987680011.8684777
2010	848490009.307862
2011	1366550005.4359431
2012	2281960002.1839147
2013	1849360010.027886
2014	2133500011.92093
2015	1614600012.3023987
2016	2408999975.204469
2017	2374850004.1961665
2018	2340010009.7656255
2019	2534230030.059815
2020	3586880020.141601
2021	4489020112.991339
2022	2209940006.256103