Year	base year varies by country
1965	7.517740745095767
1966	8.381240467405046
1967	9.015441032280618
1968	9.214612348872366
1969	9.323267225544615
1970	10.257715005740629
1971	10.671239122613219
1972	11.206344488872528
1973	12.145432910743791
1974	14.313643624347758
1975	16.658611481549165
1976	18.20901737983571
1977	19.86596735263608
1978	21.049913376175237
1979	23.07103750337708
1980	24.781923681853073
1981	29.036290621903422
1982	34.55955434319699
1983	40.65863242707569
1984	47.013006717859476
1985	53.43958218476653
1986	55.40913934165895
1987	57.48505277284038
1988	60.10206036100209
1989	63.20159487324087
1990	65.47603865157114
1991	67.22296502076071
1992	69.70641919886216
1993	72.10945724516439
1994	74.55908733397992
1995	76.64467090540423
1996	78.68284731396285
1997	81.18608975510394
1998	83.6698784096763
1999	85.90276137315217
2000	88.35718293839001
2001	90.7688382675195
2002	94.59466706922784
2003	96.2191110721802
2004	97.84661905003614
2005	100
2006	101.18694415765546
2007	102.83026092469676
2008	103.1178489193131
2009	104.75417456952658
2010	104.45342199886372
2011	104.49505090553302
2012	104.8574051929457
2013	107.04937266923709
2014	108.50656911661041
2015	110.63336661793079
2016	111.80923199993961
2017	111.38496634201715
2018	110.04478589572679
2019	110.94982862535585
2020	112.78964897175894
2021	113.01390821597441
2022	115.0409381603632