Year	current US$
1960	834.9813833108664
1961	920.9651412224172
1962	1027.7891526859157
1963	1168.6933557338564
1964	1268.876683180723
1965	1353.8901671165797
1966	1455.5922865129646
1967	1591.816957985689
1968	1714.5447776101928
1969	1882.1121310301664
1970	2106.8639592494524
1971	2305.6097505960693
1972	2671.1373144713034
1973	3205.2520403844387
1974	3621.1458224787602
1975	4106.993867714034
1976	4033.099354445845
1977	4603.599701270272
1978	5610.4980992817145
1979	6990.285806714605
1980	8456.918974438273
1981	7622.833328445835
1982	7556.523436932032
1983	7832.575386788499
1984	7739.715283617952
1985	7990.686565511819
1986	11315.015176792265
1987	14234.72863804743
1988	15744.661263542786
1989	16386.662212086587
1990	20825.78422283069
1991	21956.529770733247
1992	23243.474527720562
1993	18738.763896913206
1994	19337.630899638298
1995	20664.552270172368
1996	23081.60467577018
1997	21829.34582262216
1998	22318.137300710863
1999	22005.054540577294
2000	20137.591221767343
2001	20500.954399567163
2002	22376.297898932877
2003	27526.322460995707
2004	31317.20079432963
2005	32055.092075750315
2006	33529.72660143614
2007	37870.74750709694
2008	40944.91241946783
2009	37226.75719354016
2010	36035.64499506905
2011	38649.63948367892
2012	35051.52126977026
2013	35560.08140622885
2014	35565.721377149624
2015	30242.38613521843
2016	30960.73150889022
2017	32406.72031501343
2018	34622.16966647412
2019	33673.75096274205
2020	31922.919162618266
2021	36441.059804873425
2022	35068.835973844856
2023	38373.16604975343