Year	current US$
1970	370714767.47329
1971	423030478.086994
1972	564057043.569016
1973	702439030.494329
1974	930016968.467105
1975	1060554597.49364
1976	783853256.181068
1977	854129214.762174
1978	1107778958.10486
1979	617016823.222163
1980	479801731.475328
1981	459343263.984518
1982	565286433.58872
1983	335617961.571501
1984	222634621.927947
1985	217641760.103973
1986	333639831.177057
1987	374084800.331052
1988	400167834.763043
1989	418382875.751579
1990	672028201.626866
1991	940627996.886972
1992	514086973.933621
1993	940331231.805437
1994	704958824.905406
1995	651331548.190631
1996	740754268.195803
1997	738169056.07903
1998	793764982.367818
1999	550130452.198013
2000	2494461742.07174
2001	982748068.409202
2002	1056119254.42442
2003	965035693.872542
2004	981188997.627795
2005	1008291789.63338
2006	1105229268.62055
2007	1204238139.01158
2008	1446404269.59093
2009	1331285999.50284
2010	1334031560.5345
2011	1439789160.84542
2012	1555239261.64159
2013	567830258.223218
2014	1935976031.37438
2015	2388176330.09296
2016	2128474340.17299
2017	2496168194.23521
2018	2274596330.14994
2019	2466887218.55946
2020	2164082636.47718
2021	2280324430.81986