YearPToutPBase 100
201195.64%100
201296.93%100.1
201398.58%100.3
201498.58%100.4
2015100%100.6
201699.65%100.7
201795.22%100.9
201899.19%101
201998.46%101.1
202098.52%101.3
202198.23%101.4
Evolution : 1 % entre 2011 et 2021 soit 0.13 % de gain par an.