YearPToutPBase 100
201296.35%100
201397.01%100.2
201495.75%100.3
201598.87%100.5
201676.52%100.7
2017100%100.8
201897.74%101
201994.58%101.2
202097.51%101.3
202195.7%101.5
202297.26%101.7
Evolution : 1 % entre 2012 et 2022 soit 0.15 % de gain par an.