YearPToutPBase 100
201199.61%100
201297.17%100.2
201397.35%100.4
201496.24%100.5
201595.32%100.7
201696.05%100.9
201795.64%101.1
201895.91%101.3
201999.78%101.4
2020100%101.6
202199.79%101.8
Evolution : 1 % entre 2011 et 2021 soit 0.16 % de gain par an.