YearPToutPBase 100
201196.07%100
201294.49%100.2
201398.04%100.3
201498.24%100.5
201599.64%100.7
201699.2%100.8
201796.64%101
201896.9%101.1
201999.38%101.3
2020100%101.5
202195.48%101.6
Evolution : 1 % entre 2011 et 2021 soit 0.14 % de gain par an.