YearPToutPBase 100
201196.1%100
201299.48%100.2
201397.85%100.3
201492.45%100.5
201597.46%100.7
201694.63%100.8
201797.43%101
2018100%101.2
201998.15%101.3
202097%101.5
202198.39%101.6
Evolution : 1 % entre 2011 et 2021 soit 0.14 % de gain par an.