YearPToutPBase 100
201196.52%100
201294.95%100.1
201398.24%100.2
201499.83%100.4
201598.36%100.5
201698.79%100.6
201799.07%100.7
2018100%100.8
201996.89%101
202097.62%101.1
202197.55%101.2
Evolution : 1 % entre 2011 et 2021 soit 0.11 % de gain par an.