Year	constant 2015 US$
1960	15432.471783250057
1961	15605.523223171793
1962	16455.753515778833
1963	17007.690740282993
1964	17800.864125781616
1965	18585.8814554728
1966	19476.02704045057
1967	19715.093617881113
1968	20371.144060977527
1969	21114.28704966799
1970	21428.90915623014
1971	21642.540778589762
1972	22573.56628456114
1973	23799.69553350271
1974	24257.81679987973
1975	24275.812752183207
1976	25369.46342760642
1977	25960.639219052675
1978	26663.7707119666
1979	27384.677926986995
1980	27622.373382782258
1981	28215.530854698416
1982	26999.079071511595
1983	27418.49160033192
1984	28762.97219681643
1985	29851.64328280497
1986	30183.40878495976
1987	31001.129842426406
1988	31951.550481400624
1989	32116.923335697084
1990	31700.546269789193
1991	30654.3331377446
1992	30563.37881842327
1993	31032.754601313907
1994	32074.156243047273
1995	32595.45151816923
1996	32801.30185491548
1997	33867.00791317428
1998	34894.61342802523
1999	36391.53532589573
2000	37906.86011532932
2001	38200.45611313585
2002	38921.66729551781
2003	39270.02345440729
2004	40108.758738975
2005	41006.222931999015
2006	41663.51230543771
2007	42106.8724267286
2008	42067.56869986234
2009	40376.41536770367
2010	41164.33990626593
2011	42043.641960701614
2012	42320.64312821917
2013	42851.17053302353
2014	43643.23564748477
2015	43594.194104539434
2016	43551.34260182594
2017	44339.388669275126
2018	44907.3436837248
2019	45100.291490326184
2020	42366.12851925274
2021	44359.61672667134
2022	45227.14473542037
2023	44388.40299897506