Year	current US$
1976	348222851.995835
1977	617565395.204337
1978	402651228.9987
1979	500197285.38497
1980	327604129.379419
1981	70223821.7803469
1982	206463813.302051
1983	232618002.753083
1984	217301182.380204
1985	200265886.446047
1986	456352655.379247
1987	475600095.596892
1988	483735507.482993
1989	534670265.615971
1990	333550058.886718
1991	406228940.704874
1992	707321836.380646
1993	931577182.149721
1994	1255989792.07958
1995	1346948433.38712
1996	938825854.726995
1997	1124876324.27219
1998	1582412384.85906
1999	1307506993.77796
2000	1225146753.42094
2001	1532169270.0036
2002	1207241240.55375
2003	1126793466.59181
2004	1183211776.9703
2005	1480934814.60775
2006	1688033737.81757
2007	1057790123.82099
2008	617389755.731342
2009	600864006.608077
2010	1004714675.52173
2011	994373740.774992
2012	742561546.365225
2013	164255797.160278
2014	474853172.227481
2015	566689219.529457
2016	869487332.806082
2017	1073109263.47155
2018	992809503.758156
2019	1705937823.76372
2020	1800225823.85271
2021	1175054211.7103