YearPToutPBase 100
20111.43%100
20121.44%95.6
20131.45%91.3
20141.47%86.9
20151.46%82.5
2016100%78.2
20171.41%73.8
20181.36%69.5
20191.38%65.1
20201.32%60.7
20211.89%56.4
20221.46%52
20231.45%47.6
Evolution : -52 % entre 2011 et 2023 soit 5.55 % de perte par an.