Year	current US$
1960	216.98264788600966
1961	230.27500663299085
1962	238.46760278539327
1963	233.44656103534558
1964	267.12932708673327
1965	282.4222331083309
1966	295.80789170285004
1967	288.3564537195995
1968	316.3561688888347
1969	317.38337751659475
1970	334.44120236217566
1971	380.6375126099798
1972	391.52228732108006
1973	472.2500124533516
1974	1024.3363035835805
1975	1158.457106162881
1976	1479.6499342283582
1977	1599.8247377280131
1978	1853.5740053871234
1979	2857.55959079762
1980	3850.2584966391573
1981	2688.725451864803
1982	2929.4487764752507
1983	2731.724481303322
1984	3052.4997994914665
1985	3073.8608560546863
1986	2926.917839991906
1987	3420.5403396867287
1988	3690.0711935243994
1989	3774.2064386006123
1990	10216.568807532716
1991	22.850370515730692
1992	30.11431551469221
1993	53.48023499868696
1994	197.12242655176584
1995	615.5003718155976
1996	482.1636186062816
1997	929.8764465524249
1998	894.3290943323831
1999	1548.2982843357959
2000	1963.7228386271531
2001	1422.8313389037573
2002	1254.1620451282845
2003	809.8456840482595
2004	1314.9695842570259
2005	1744.5087261776848
2006	2253.7859840833603
2007	3099.5920440116843
2008	4504.508109244838
2009	3686.402088884795
2010	4430.426241895183
2011	5736.898958972388
2012	6437.502910632843
2013	6612.9022521023435
2014	6215.986033140286
2015	4416.942924080419
2016	4308.8480891005365
2017	4725.19357334032
2018	5601.467061027054
2019	5621.1816949175245
2020	4250.742908291594
2021	4816.784833953134
2022	6441.917364518131
2023	5512.475719784219