Year	current US$
1978	345200.3598
1979	492476.2845
1980	390921.8907
1981	289367.497
1982	187813.1032
1983	701136.1122
2003	54069839.2743908
2004	60748749.1709703
2005	59304087.5437293
2006	63773517.3418823
2007	55662540.3698083
2008	64811558.9717228
2009	79801153.1264916
2010	115699060.997021
2011	91358953.7745977
2012	106349453.092419
2013	109829221.95462
2014	137771209.405021
2015	154062367.652957
2016	145678794.701272
2017	160167345.280047
2018	212034736.09746
2019	275825107.455024
2020	416418880.667872
2021	547051423.801967
2022	501844380.374608
2023	627524553.178148