Year	base year varies by country
1960	2.627060788656869
1961	2.691854346772172
1962	2.8559455244863123
1963	3.0800051518251563
1964	3.2726385181725237
1965	3.572571474202715
1966	3.8645842978506235
1967	4.194531649129363
1968	4.442475872369841
1969	4.670519293600594
1970	4.948068934215187
1971	5.3362956182852885
1972	5.79083718031367
1973	6.477027907374751
1974	7.509797286677205
1975	8.770075076721056
1976	10.216253579899744
1977	12.605127316933288
1978	15.205696423672354
1979	17.780268801334444
1980	20.154792981687493
1981	22.644150258414886
1982	25.719751977043366
1983	28.77635042977002
1984	31.902824197842527
1985	34.64502490844323
1986	38.41399370825857
1987	40.69739756277684
1988	43.113246510824524
1989	46.086419705598445
1990	49.46282645328388
1991	52.89314254916844
1992	56.44268031454045
1993	59.003620895780664
1994	61.29286811317486
1995	64.31652486221019
1996	66.54193530835985
1997	68.1096537250787
1998	69.8577572613404
1999	71.63291980957946
2000	74.0181203299591
2001	77.05895673662503
2002	80.20656439032794
2003	83.36149227863017
2004	86.59777297931275
2005	90.14914085071139
2006	93.73674007560024
2007	96.93915902583058
2008	99.12448485314127
2009	99.26700141753905
2010	99.41935579541304
2011	99.39973107503643
2012	99.28581126428836
2013	99.68064753351491
2014	99.45763932967265
2015	100
2016	100.32209801213854
2017	101.62549458081051
2018	102.8912933856397
2019	104.38049919421275
2020	105.56797705638732
2021	108.3722047801905
2022	112.86133175964082
2023	119.55150877772607