Year	current US$
1967	25203524.032563843
1968	28084252.758274823
1969	28606411.39804096
1971	50056882.82138794
1972	40606712.05063896
1973	55272108.84353741
1974	84539332.28256197
1975	74620320.02953394
1976	83100834.30793503
1977	93145283.35571408
1978	111027427.2083584
1979	151276496.48253277
1980	182852106.42700225
1981	193750540.63247705
1982	192902018.72302037
1983	181220399.01337156
1984	181570474.07779604
1985	165524943.64069432
1986	147620047.52799308
1987	155128542.23947382
1988	176494393.88970172
1989	172882410.67885554
1990	214877666.69975242
1991	227540473.34008658
1992	269034595.8129845
1993	300746361.1287394
1994	402837005.2725957
1995	469443201.5032737
1996	510586430.1901267
1997	526554005.9543571
1998	457579840.22506624
1999	488024514.36935914
2000	419842674.2276522
2001	409508552.9799725
2002	346406738.8852372
2003	417668983.4083494
2004	468005318.5519772
2005	552864570.2258192
2006	617258154.2601326
2007	695295347.6215369
2008	776337691.795098
2009	805557562.5800586
2010	898133684.8987929
2011	1063895360.6990681
2012	1185215418.2556212
2013	1285911586.1320012
2014	1335571420.7267592
2015	1307909887.5521197
2016	1379490304.2253969
2017	1469789119.0875561
2018	1615478393.2861407
2019	1619155017.392397
2020	1536145814.1700656
2021	1522794913.091401
2022	1566360686.1063213
2023	1631286701.1151562