YearPToutPBase 100
201197.8%100
201296.2%100.2
201397.44%100.3
201496.44%100.5
201594.14%100.7
201694.57%100.8
201793.82%101
201898.93%101.2
2019100%101.4
202097.68%101.5
202197.73%101.7
Evolution : 1 % entre 2011 et 2021 soit 0.15 % de gain par an.