YearPToutPBase 100
201195.34%100
201294.41%100.5
201395.24%101
201491.35%101.5
201592.61%102
201695.46%102.4
201793.43%102.9
201897.09%103.4
201997.84%103.9
202096.05%104.4
2021100%104.9
Evolution : 4 % entre 2011 et 2021 soit 0.44 % de gain par an.