YearPToutPBase 100
201299.59%100
201395.6%100.2
201499.11%100.4
201598.15%100.6
201698.04%100.8
201798.98%100.9
2018100%101.1
201997.62%101.3
202099.73%101.5
202199.88%101.7
Evolution : 1 % entre 2012 et 2021 soit 0.17 % de gain par an.