YearPToutPBase 100
201196.55%100
201298.07%100.2
201397.17%100.4
201497.55%100.6
201595.46%100.7
2016100%100.9
201796.87%101.1
201899.42%101.3
201998.71%101.5
202097.7%101.7
202198.81%101.8
Evolution : 1 % entre 2011 et 2021 soit 0.16 % de gain par an.