Year	current US$
1960	79951511.24644603
1961	82338123.52245934
1962	84724735.79847264
1963	93077878.76451924
1964	121717226.07667902
1965	125297144.49069898
1966	118137307.66265903
1967	131263675.18073227
1968	143196736.56079882
1969	156323104.07887203
1970	183769145.2530251
1971	223148247.80724478
1972	285200166.9835909
1973	383051270.3001367
1974	482095679.75468916
1975	479709067.47867584
1976	453456332.44252944
1977	539374374.3790087
1978	643192008.3855877
1979	856793807.0887791
1980	1003570462.0635978
1981	1060578014.9382163
1982	889555356.3143606
1983	861051579.8770512
1984	844424376.9552875
1985	837298432.8459601
1986	795730425.5415508
1987	786229166.7291143
1988	938249307.7280971
1989	1093922959.6829832
1990	1321122343.617141
1991	1235922574.6418316
1992	1262218799.6342108
1993	1373714793.6018996
1994	1495729277.56654
1995	1604026615.9695816
1996	1727649049.4296577
1997	1710280608.3650188
1998	1411952091.2547526
1999	1632633460.0760453
2000	1550899619.7718627
2001	1624460076.0456269
2002	1643871863.1178703
2003	2032107604.5627372
2004	2456101901.1406837
2005	2775885551.330798
2006	3113037642.5855513
2007	3244833460.0760455
2008	3931397718.6311784
2009	2887247908.745247
2010	3561552091.2547526
2011	4147992395.4372625
2012	4276723193.91635
2013	4968395817.490494
2014	5374000000
2015	4157000000
2016	4419000000
2017	4605000000
2018	4947000000
2019	5055000000
2020	3688000000.0000005
2021	4376000000.000001
2022	5469000000.000001
2023	5884000000