YearPToutPBase 100
201196.07%100
201294.89%100.2
201396.82%100.3
201498.47%100.5
201598.31%100.6
201697.02%100.8
201797.56%100.9
2018100%101.1
201996.76%101.2
202098.14%101.4
202196.35%101.5
Evolution : 1 % entre 2011 et 2021 soit 0.14 % de gain par an.