YearPToutPBase 100
201197.5%100
201296.86%100.2
201397.4%100.5
201497.68%100.7
201598.36%100.9
201698.05%101.2
2017100%101.4
201899.26%101.6
201999.61%101.9
202098.92%102.1
202198.58%102.3
Evolution : 2 % entre 2011 et 2021 soit 0.21 % de gain par an.