Year	current US$
1960	-0.4576837471741292
1961	3.2436447169419096
1962	2.9350652441476215
1963	4.131089433621299
1964	2.3754556793543133
1965	2.1777415351819895
1966	4.435074968351692
1967	4.92711898863908
1968	5.913698774787755
1969	5.214722423066463
1970	6.373038841218528
1971	4.863255778999498
1972	4.691740789936366
1973	5.769698448678171
1974	3.800789985204166
1975	3.0136220066491495
1976	2.838205037852713
1977	1.6466258325278844
1978	2.302467695655131
1979	1.544606881172469
1980	1.6144438991814205
1981	1.9909668359761723
1982	2.2535873426596873
1983	1.5608546800004985
1984	1.7407348782875978
1985	1.7908864088964533
1986	1.6762293698777282
1987	2.673589888655019
1988	2.5559297808004144
1989	2.354406797497544
1990	3.099560900718506
1991	3.948290321918305
1992	7.033493397201582
1993	3.069502048766226
1994	2.6054341402276258
1995	5.052807608185476
1996	5.32476923088624
1997	5.11584991513441
1998	4.7255966993875305
1999	8.251386097889641
2000	5.160507419321341
2001	10.038688394592683
2002	11.327914257426018
2003	19.874475637168747
2004	12.870403861617367
2005	15.23106798011174
2006	23.49010133363337
2007	17.14473750130523
2008	22.36660959149145
2009	23.918220413232483
2010	15.018930846370438
2011	22.370661155449174
2012	16.69243392508362
2013	18.544947415871558
2014	26.225875871218374
2015	28.776058383556673
2016	23.23291974374855
2017	17.587189388287904
2018	36.141635259769366
2019	17.408550711734453
2020	36.70401899255816
2021	37.20997635111869
2022	36.30545528131286