Year	base year varies by country
1982	19.225039479965318
1983	20.565606411718868
1984	23.167226609357204
1985	23.46528687940776
1986	24.209296079517056
1987	26.226273788572946
1988	27.962068390742083
1989	31.334692720447073
1990	33.6859901409967
1991	36.46051358520964
1992	39.67998531430263
1993	42.889993954996555
1994	46.22661733663725
1995	48.80459496530855
1996	49.830815170637806
1997	50.989955150341956
1998	50.6299265240327
1999	48.78938713552674
2000	49.14913528296418
2001	48.48660465890185
2002	47.474424293631536
2003	46.36393138431168
2004	47.08965982721101
2005	49.40565898559685
2006	52.68531212796282
2007	56.95590572819894
2008	62.83069714929751
2009	62.193939297405564
2010	65.56279268572553
2011	70.2988331376257
2012	74.27394809088432
2013	79.11430531137457
2014	85.18696686560519
2015	88.27399089931454
2016	89.74125408557991
2017	92.47698236805168
2018	95.33924944551653
2019	96.92596014147689
2020	98.00061412375923
2021	100
2022	101.05670193015017
2023	101.0704217987608