Year	current US$
1970	561940032.559455
1971	619523263.71128
1972	668861442.500715
1973	883122164.306829
1974	1076799333.54341
1975	1451258272.18361
1976	1630770632.40498
1977	1775715781.86252
1978	1922612375.40884
1979	2007434887.80339
1980	2421519214.2174
1981	2405908757.2334
1982	2364313543.85099
1983	2329107374.03928
1984	2365315082.11318
1985	2668506999.23254
1986	3594320632.18391
1987	4564157649.12755
1988	5335030427.86069
1989	5755802415.13096
1990	7228225756.492
1991	7828739139.83238
1992	7235358101.9379
1993	6463278592.69283
1994	6845112286.85259
1995	8858148148.14812
1996	8782086461.29951
1997	8708711958.02313
1998	8459693278.41122
1999	7432035390.12856
2000	6762661528.32002
2001	7056967322.60338
2002	7816063245.06824
2003	9664094756.10059
2004	11176431217.1139
2005	11562598380.3368
2006	11982818672.7423
2007	13627769119.6993
2008	15569050291.6225
2009	15424397239.7567
2010	15335922084.6284
2011	16654899386.5915
2012	17516098906.6025
2013	18214012583.6976
2014	18290512624.7152
2015	15034168149.9891
2016	15044210680.4108
2017	14799818750.8887
2018	15826818215.3172
2019	15429438399.7825
2020	15803988893.7515
2021	17317413556.7777