YearPToutPBase 100
201196.23%100
201296.88%100.2
201398.01%100.4
201495.5%100.5
201597.89%100.7
201698.44%100.9
2017100%101.1
201899.06%101.2
201997.71%101.4
202098.26%101.6
202197.27%101.8
Evolution : 1 % entre 2011 et 2021 soit 0.16 % de gain par an.