YearPToutPBase 100
201196.8%100
201297.34%100.3
201396.44%100.5
201496.6%100.8
201597.94%101.1
201698.32%101.3
201797.16%101.6
201898.02%101.9
2019100%102.1
202097.85%102.4
202199.51%102.7
Evolution : 2 % entre 2011 et 2021 soit 0.24 % de gain par an.