YearPToutPBase 100
201182.01%100
201286.18%102
201385.33%104.1
201489.18%106.1
201586.48%108.2
201689.06%110.2
201796.16%112.3
201895.45%114.3
201997.87%116.3
2020100%118.4
202196.2%120.4
Evolution : 20 % entre 2011 et 2021 soit 1.70 % de gain par an.