YearPToutPBase 100
201085.37%100
201181.33%98.9
2012100%97.8
201371.35%96.7
201478.77%95.6
201577.38%94.5
201676.75%93.5
201784.09%92.4
201880.65%91.3
201978.98%90.2
202073.68%89.1
Evolution : -10 % entre 2010 et 2020 soit 1.04 % de perte par an.