YearPToutPBase 100
201196.37%100
201296.52%100.3
201397.02%100.6
201498.41%100.8
201599.4%101.1
201698.9%101.4
201798.82%101.7
201897.36%102
201998.78%102.2
2020100%102.5
202199.02%102.8
Evolution : 2 % entre 2011 et 2021 soit 0.25 % de gain par an.