YearPToutPBase 100
201198.9%100
201294.33%100.2
201395.55%100.4
201498.37%100.6
201599.88%100.8
201699.33%100.9
201797.27%101.1
201895.26%101.3
2019100%101.5
202097.36%101.7
202199.6%101.9
Evolution : 1 % entre 2011 et 2021 soit 0.17 % de gain par an.