Year	current US$
1967	31300692.43882314
1968	35142330.51341319
1969	38082699.03266177
1970	44862008.928646855
1971	53022179.53799428
1972	48804174.551863715
1973	57427641.07130313
1974	68548731.67644593
1975	80256489.46003717
1976	103368693.1821116
1977	133914203.9040452
1978	141808858.85259086
1979	191329840.41811937
1980	260555262.9074782
1981	204680022.81649745
1982	190127240.21414164
1983	206683337.16311574
1984	235050768.16930857
1985	236903570.4374322
1986	268401430.4301321
1987	325338119.75928575
1988	316261753.4402649
1989	344950273.5350468
1990	419815580.4121097
1991	441616266.8316642
1992	442408867.81377864
1993	446796326.1487317
1994	404768737.7629817
1995	529405656.1845194
1996	524706724.58735067
1997	642627518.238185
1998	620691653.652538
1999	696780779.698716
2000	665700074.2192452
2001	912604238.3642516
2002	1097691767.0909567
2003	1214785254.797803
2004	1291412639.852989
2005	1436233264.6395595
2006	1963284247.3988523
2007	1969959416.8583
2008	2473786768.1048036
2009	2221698090.810851
2010	2441103490.403856
2011	2953292430.3953304
2012	3465895667.7176733
2013	3302798626.9533987
2014	3240081519.3973927
2015	3150871348.2864814
2016	3288114305.160609
2017	3413353930.700022
2018	4186182064.01453
2019	4441938779.191372
2020	5354300846.664957
2021	5380996372.833658
2022	5445138868.629797
2023	5893554318.398271