YearPToutPBase 100
201296.07%100
201397.24%100.4
201495.75%100.7
2015100%101.1
201698.14%101.4
201797.65%101.8
201899.79%102.1
201998.77%102.5
202098.81%102.8
202199.55%103.2
Evolution : 3 % entre 2012 et 2021 soit 0.32 % de gain par an.