YearPToutPBase 100
201295.25%100
201399.15%100.2
201499.21%100.4
201597.3%100.6
201699.16%100.8
2017100%101
201898.86%101.2
201999.31%101.4
202098.18%101.6
202198.76%101.8
202299.68%102
Evolution : 2 % entre 2012 et 2022 soit 0.18 % de gain par an.