YearPToutPBase 100
201197.35%100
201294.51%100.2
201398.35%100.4
201498.47%100.6
201598.65%100.8
201697.24%101
201796.73%101.2
201899.27%101.4
2019100%101.6
202099.29%101.8
202196.9%102
Evolution : 2 % entre 2011 et 2021 soit 0.18 % de gain par an.