YearPToutPBase 100
201194.81%100
201294.29%100.2
201395.76%100.4
201495.7%100.5
201594.57%100.7
201695.02%100.9
201796.53%101.1
2018100%101.3
201998.31%101.5
202094.13%101.6
202195.1%101.8
Evolution : 1 % entre 2011 et 2021 soit 0.16 % de gain par an.