Year	base year varies by country
1970	11.26002051477663
1971	11.98688535019546
1972	12.8797645040195
1973	13.792443432549984
1974	15.499322459222084
1975	17.382490717730068
1976	19.079281683135427
1977	20.839553641895215
1978	22.32929591153737
1979	23.26900737194069
1980	25.49192938316518
1981	28.431211636534158
1982	31.51790828421519
1983	34.09512728657161
1984	36.10868172315578
1985	38.48950674256375
1986	41.09761026642793
1987	44.78018061572981
1988	47.59651091635709
1989	49.680204865928005
1990	51.19869274489408
1991	52.72195544643824
1992	53.63827270309677
1993	54.71329879808052
1994	55.330325953746964
1995	56.87272667919701
1996	58.03963649574961
1997	59.104605701225545
1998	60.6605821615401
1999	62.439165731845414
2000	64.83651891180833
2001	67.12674059988504
2002	68.3822853662995
2003	70.38392873603424
2004	71.72456959068776
2005	73.32695783119298
2006	75.91139248873773
2007	78.78314963110813
2008	82.54985166834878
2009	85.0493117937175
2010	88.05585469661715
2011	90.66772432632166
2012	92.97238967841157
2013	95.52542334886412
2014	98.05199385866634
2015	100
2016	101.99008659253042
2017	104.29131358539165
2018	107.71020915419356
2019	110.62773803582321
2020	114.54100733952895
2021	117.71198635731919
2022	124.1184292823374
2023	132.52490071827015