Year	current US$
1960	1444.1649730830857
1961	1687.5693508674988
1962	1286.1579488573166
1963	1477.8019053309235
1964	1616.6821625275827
1965	1679.3921176005206
1966	1778.7575844936985
1967	1724.9915670542928
1968	1936.1952190868
1969	2176.493136225316
1970	2476.2198806796573
1971	2284.891877837455
1972	2912.5873055326556
1973	3610.6779758115613
1974	5056.301712603716
1975	4645.443932635495
1976	4490.491301747559
1977	5024.460757218267
1978	4769.481297912275
1979	5937.693030118394
1980	6511.034017497851
1981	6756.311205744571
1982	7215.992058828973
1983	7914.383428518212
1984	7326.284522842407
1985	6789.538692729694
1986	8287.70349203074
1987	9796.952351706765
1988	11785.069206905431
1989	11541.167989884752
1990	13232.059122094297
1991	14263.883027229813
1992	15421.124562280924
1993	15091.870603455693
1994	16710.53807632738
1995	18916.67361624386
1996	20116.98187394919
1997	20366.58291000972
1998	20106.630747330553
1999	19742.52039362016
2000	21630.747608788668
2001	20909.430361636976
2002	19035.10241444934
2003	19627.175493663137
2004	20557.07862700291
2005	21223.93559019393
2006	22494.642093162078
2007	25633.64321695829
2008	30173.36159388563
2009	28317.040844148712
2010	31266.60531743833
2011	34354.71611822313
2012	33156.22831576376
2013	36941.842357358226
2014	38259.681095617336
2015	36206.52221716209
2016	37690.47395118594
2017	41114.78170825531
2018	42406.84542636065
2019	44452.232562309255
2020	44846.79159548156
2021	52129.51596121085
2022	54930.93880750964
2023	52261.67615096326