YearPToutPBase 100
201099.3%100
201197.21%100.2
201298.21%100.4
201399.07%100.6
201496.47%100.8
201596.67%101
201698.33%101.2
2017100%101.5
201899.99%101.7
201999.86%101.9
202099.83%102.1
Evolution : 2 % entre 2010 et 2020 soit 0.19 % de gain par an.