YearPToutPBase 100
201195.33%100
201293.95%100.1
201396.45%100.2
201496.99%100.3
201597.91%100.4
201699.04%100.6
201799.17%100.7
2018100%100.8
201998.49%100.9
202098.13%101
202191.68%101.1
Evolution : 1 % entre 2011 et 2021 soit 0.10 % de gain par an.