Year	base year varies by country
1990	3.81551357893135
1991	7.43749620323812
1992	22.9207138679704
1993	31.4195127117606
1994	38.5169407160463
1995	44.3542056783645
1996	49.4338518183942
1997	53.6015376031386
1998	57.5830766211576
1999	61.3440689286497
2000	64.758030555233
2001	70.375931172248
2002	75.7116136743152
2003	79.982090180317
2004	82.670241917721
2005	83.9273050749424
2006	85.7914067928993
2007	89.375329534275
2008	93.3664901980161
2009	96.5406529234182
2010	95.5469427161486
2011	96.5406452592415
2012	97.0031176797686
2013	98.5555128307135
2014	99.0049571282187
2015	100
2016	100.874115426326
2017	102.350977059698
2018	104.513235075482
2019	106.911657907391
2020	108.113407003931
2021	111.00702741208
2022	118.20327720593
2023	128.702625810208