YearPToutPBase 100
2011100%100
201297.85%98.5
201385.74%96.9
201484.34%95.4
201588.72%93.8
201686.58%92.3
201787.62%90.8
201885.3%89.2
201984.27%87.7
202081.27%86.1
202181.85%84.6
Evolution : -15 % entre 2011 et 2021 soit 1.51 % de perte par an.