Year	base year varies by country
1960	5.681644772896716
1961	5.740815448429671
1962	5.957850486044381
1963	6.1097185458111785
1964	6.087499210672795
1965	6.212756840158053
1966	6.283375109910288
1967	6.2922392198698205
1968	6.4982172408426315
1969	6.722678369922488
1970	7.061975102713519
1971	7.173080011031678
1972	7.554488891922221
1973	7.918822245078855
1974	9.10036674036481
1975	10.396890143904528
1976	11.856138384140287
1977	12.469917248364238
1978	14.008014073215557
1979	15.829712293702821
1980	17.442414866117236
1981	18.745179808657642
1982	21.772204683334774
1983	22.805559183271633
1984	23.251084244729604
1985	22.11713311260693
1986	21.31999346495183
1987	21.965660907614367
1988	21.831559030499488
1989	22.317296909789526
1990	22.80305450819277
1991	22.975587013488262
1992	23.670629414749232
1993	24.23359316004174
1994	32.722648175541416
1995	37.66358869983876
1996	40.26512337606614
1997	41.74185046985587
1998	43.92561910075669
1999	65.16038057422395
2000	67.9890289655435
2001	69.32860700037077
2002	71.79269353958013
2003	73.99077339870811
2004	74.560288523362
2005	77.76165689083707
2006	79.39023254718684
2007	79.69997611028082
2008	84.82799388118683
2009	86.98236370725459
2010	87.74857888499477
2011	91.02430620156579
2012	98.0321838636733
2013	99.4019859949445
2014	99.15568511603453
2015	100
2016	100.68359111127465
2017	100.313178470008
2018	100.98572578180605
2019	100.5842531984837
2020	103.47910048278112
2021	105.15414262104765
2022	109.50624124513979
2023	113.21353600566168