YearPToutPBase 100
201199.57%100
201297.77%99.2
2013100%98.3
201498.71%97.5
201599.97%96.7
201698.17%95.8
201796.68%95
201893.45%94.2
201995.73%93.4
202091.49%92.5
202191.49%91.7
Evolution : -8 % entre 2011 et 2021 soit 0.78 % de perte par an.