YearPToutPBase 100
201296.4%100
201398.46%100.2
201498.01%100.4
2015100%100.6
201697.49%100.9
201799.14%101.1
201898.98%101.3
201998.61%101.5
202099.25%101.7
202199.48%101.9
Evolution : 1 % entre 2012 et 2021 soit 0.19 % de gain par an.