YearPToutPBase 100
201194.76%100
201296.87%100.2
201398.03%100.4
2014100%100.6
201599.34%100.8
201698.22%101
201798.24%101.2
201899.24%101.4
201998.53%101.6
202097.44%101.8
202198.7%101.9
Evolution : 1 % entre 2011 et 2021 soit 0.17 % de gain par an.