YearPToutPBase 100
201197.33%100
201294.75%100.2
201399.54%100.4
201499.9%100.6
201599.56%100.8
201698.94%101
201799.32%101.2
2018100%101.4
201999.88%101.6
202098.63%101.9
202198.45%102.1
Evolution : 2 % entre 2011 et 2021 soit 0.19 % de gain par an.