YearPToutPBase 100
201197.14%100
201296.57%100.2
201399.88%100.4
201495.91%100.6
201597.06%100.8
201690.71%101
201796.6%101.2
201899.17%101.4
201999.97%101.6
202096.64%101.8
2021100%102
Evolution : 2 % entre 2011 et 2021 soit 0.18 % de gain par an.