YearPToutPBase 100
201196.88%100
201298.13%100.2
201397.78%100.3
201498.7%100.5
201599.29%100.7
2016100%100.8
201799.72%101
201898.87%101.1
201998.28%101.3
202099.43%101.5
202198.92%101.6
Evolution : 1 % entre 2011 et 2021 soit 0.14 % de gain par an.