Year	current US$
1960	59.297112603283175
1961	62.74299129960262
1962	66.44872497901471
1963	69.37886761587258
1964	74.01435561787756
1965	80.19387247145933
1966	89.52806428074614
1967	101.33060909912508
1968	113.70097470758276
1969	131.85046538185534
1970	162.50605098740337
1971	210.95908972117587
1972	262.4651332781158
1973	371.4349939630182
1974	442.53604127744796
1975	487.91583192992647
1976	485.4037621555082
1977	559.656368374703
1978	695.0924711583972
1979	917.5940221410782
1980	1130.3159713457371
1981	1092.664572164071
1982	992.1180514729301
1983	1105.1302058711144
1984	1128.87193740341
1985	978.9930857495842
1986	1180.9088927052676
1987	1610.3652034484635
1988	2096.7358022123194
1989	2369.1256177791724
1990	2825.724780687323
1991	2855.9484272248874
1992	2918.6170054914946
1993	2844.9957495344165
1994	2832.813408956591
1995	3064.5859847133725
1996	3063.9945655351316
1997	3100.1656380661007
1998	2893.32874464307
1999	3242.1373354511356
2000	3351.696516853101
2001	3115.678999542804
2002	3029.7883623397315
2003	4111.738085109414
2004	4818.213102970227
2005	5240.316159067996
2006	5142.913833543588
2007	5372.340731743536
2008	5345.848751773761
2009	4938.249905840917
2010	6041.732051196527
2011	7080.778642625648
2012	6392.987347368388
2013	6436.603318665577
2014	6844.033249663489
2015	5869.737578906277
2016	6411.551861596597
2017	6705.3408456728275
2018	6947.81784114167
2019	6691.160845792073
2020	5875.070435041913
2021	7244.158547556661
2022	7726.110996646887
2023	7249.79932596262