YearPToutPBase 100
200991.97%100
201092.7%99.1
201191.15%98.2
201294.39%97.3
2013100%96.4
201494.34%95.4
201577.04%94.5
201687.28%93.6
201788.23%92.7
201886.21%91.8
201986.33%90.9
202085.81%90
Evolution : -10 % entre 2009 et 2020 soit 0.87 % de perte par an.