Year	base year varies by country
1990	3.790809426590822
1991	4.701791900045609
1992	6.081960042232959
1993	7.797522968352339
1994	10.166530882940474
1995	12.31539803730175
1996	14.719269417251871
1997	16.688978738331144
1998	25.20835352207425
1999	27.65370641124067
2000	29.973821941952394
2001	31.211299401792907
2002	32.9656177973264
2003	36.332578005409886
2004	39.21449986190815
2005	40.95577131953768
2006	42.78350799460131
2007	47.23216714773205
2008	56.43280504645357
2009	60.75208036232462
2010	66.20310642685058
2011	74.76747576120606
2012	85.2825992360876
2013	91.87577694414803
2014	96.23595578668645
2015	100
2016	105.01687178682553
2017	109.17276333503325
2018	115.48292366193229
2019	121.5995195044078
2020	121.4664981410575
2021	124.7402991971423
2022	128.34833662442605
2023	132.1690724748089