YearPToutPBase 100
201098.08%100
201197.4%100.2
201295.69%100.4
201394.07%100.6
201494.9%100.8
201597.8%100.9
201696.75%101.1
201795.69%101.3
2018100%101.5
201997.03%101.7
202097.78%101.9
202198.79%102.1
Evolution : 2 % entre 2010 et 2021 soit 0.17 % de gain par an.