YearPToutPBase 100
201197.74%100
201298.16%100.1
201396.12%100.2
201498.9%100.3
201597.91%100.4
2016100%100.5
201799.88%100.6
201899.92%100.8
201998.13%100.9
202099.1%101
202197.31%101.1
Evolution : 1 % entre 2011 et 2021 soit 0.10 % de gain par an.