Year	base year varies by country
1970	6.169472108995957
1971	6.169472108995957
1972	6.169472108995923
1973	9.516585139102746
1974	22.674548125242485
1975	26.982919967899388
1976	30.15997837416452
1977	31.74511327468669
1978	30.582889283346766
1979	32.739295089815236
1980	35.85475856450841
1981	38.384126764353475
1982	38.88805996145495
1983	37.481083256099815
1984	35.195686503474846
1985	35.45632213785924
1986	34.85410171934192
1987	36.13867919539861
1988	36.99915767385659
1989	37.647115267859164
1990	38.90298557205365
1991	39.21842993372213
1992	39.92703877088799
1993	40.43732082435032
1994	40.33118299683875
1995	41.9071158085909
1996	44.32643200088567
1997	43.90431107267469
1998	42.03642616735405
1999	45.585720299442286
2000	50.80963223410476
2001	49.61595764275972
2002	51.48689579580105
2003	53.5836516399235
2004	58.13902402037887
2005	67.74725757771199
2006	75.8512856667249
2007	85.35845598101521
2008	101.17824001581668
2009	85.81636818466626
2010	100
2011	113.16721937261983
2012	118.46313417148554
2013	117.33853363815211
2014	116.55465432020561
2015	97.59470167869586
2016	92.19822352229691
2017	96.79542346211603
2018	104.47783232997145
2019	101.14038262843745
2020	88.97187441159707
2021	101.28893637319263
2022	114.70114854299807
2023	110.29307609875987