YearPToutPBase 100
201192.97%100
201292.27%100.5
201391.08%101
201493.2%101.6
201593.49%102.1
201689.81%102.6
201791.76%103.1
201887.57%103.6
201992.55%104.2
202098.57%104.7
2021100%105.2
Evolution : 5 % entre 2011 et 2021 soit 0.46 % de gain par an.