YearPToutPBase 100
201196.23%100
201295.08%100.2
201398.21%100.4
201496.2%100.6
201597.57%100.7
201698.73%100.9
2017100%101.1
201897.1%101.3
201998.05%101.5
202098.8%101.7
202196.45%101.9
Evolution : 1 % entre 2011 et 2021 soit 0.17 % de gain par an.