YearPToutPBase 100
201113.57%100
201241.66%96.1
201313.58%92.2
201413.39%88.3
201514.36%84.4
2016100%80.5
20179.9%76.6
201814.05%72.7
201914.4%68.8
202014.54%64.8
202114.56%60.9
202214.3%57
202314.58%53.1
Evolution : -46 % entre 2011 et 2023 soit 4.75 % de perte par an.