YearPToutPBase 100
201196.96%100
201296.93%100.2
201399.45%100.4
201495.26%100.6
201595.18%100.8
201694.26%101.1
201799.31%101.3
201895.8%101.5
201998.5%101.7
2020100%101.9
202198.51%102.1
Evolution : 2 % entre 2011 et 2021 soit 0.19 % de gain par an.