YearPToutPBase 100
2011100%100
201298.55%97.6
201399.43%95.1
201480.41%92.7
201599.97%90.3
201697.08%87.9
201796.53%85.4
201899.29%83
201987.04%80.6
202052.48%78.2
202182.54%75.7
Evolution : -24 % entre 2011 et 2021 soit 2.50 % de perte par an.