YearPToutPBase 100
201197.94%100
201295.34%100.2
201391.59%100.4
201489.83%100.6
201589%100.8
201690.19%101
201765.93%101.2
2018100%101.4
201998.21%101.6
202097.23%101.8
202196.95%102
Evolution : 2 % entre 2011 et 2021 soit 0.18 % de gain par an.