Year	base year varies by country
1970	15.775465486671237
1971	16.719178235090713
1972	17.86394107721705
1973	19.25153124176906
1974	21.439398952781076
1975	24.367347610176367
1976	26.998402046069526
1977	29.374585007475318
1978	32.06792542772611
1979	35.30610457070458
1980	39.28280079104224
1981	43.777191523771236
1982	49.02523704781041
1983	53.69107223354875
1984	57.59858877795995
1985	60.78195918452405
1986	63.99065411069166
1987	65.76830672885923
1988	67.79073727881018
1989	70.03128247491179
1990	71.88146158532325
1991	73.7086451611031
1992	75.28118232182857
1993	76.45019067317992
1994	77.47829858934983
1995	78.49165790527974
1996	79.7510123271711
1997	80.55916321751232
1998	81.28493080001613
1999	81.32335521971198
2000	82.46072442176784
2001	83.82037389058668
2002	85.81464730991493
2003	87.42906423627798
2004	87.2181384751011
2005	89.00974453515934
2006	90.94100074682598
2007	93.26517293887316
2008	95.47613906283739
2009	95.58705340834366
2010	96.60932019375315
2011	97.52519397128333
2012	98.65801439102988
2013	99.4259240608319
2014	100
2015	101.13797243776995
2016	101.66565137934036
2017	102.1972498474132
2018	103.21250381834844
2019	104.53090332805071
2020	107.49863363089815
2021	109.0293453724605
2022	112.24366219925723