YearPToutPBase 100
2011100%100
201294.55%96.1
201395.6%92.3
201493.07%88.4
201588.57%84.5
201684.81%80.7
201782.52%76.8
201874.83%72.9
201971.33%69.1
202059.96%65.2
202163.58%61.3
Evolution : -38 % entre 2011 et 2021 soit 4.35 % de perte par an.