Year	base year varies by country
2012	91.68608847769794
2013	90.92271517317307
2014	91.11865342611463
2015	94.15244352671644
2016	93.8796039705895
2017	100
2018	107.81548372418146
2019	110.44788908303349
2020	109.25157041483497
2021	110.2759762528352