YearPToutPBase 100
200999.8%100
201097.92%98.4
201197.63%96.8
201297.58%95.2
201397.65%93.6
201499.96%92
2015100%90.5
201696.86%88.9
201795.81%87.3
201889.36%85.7
201983.69%84.1
202081.05%82.5
202178.52%80.9
Evolution : -19 % entre 2009 et 2021 soit 1.62 % de perte par an.