YearPToutPBase 100
200998.7%100
201098.59%100.2
201195.78%100.5
201295.94%100.7
201396.67%100.9
201497.65%101.1
201598.49%101.4
201697.81%101.6
201799.14%101.8
2018100%102.1
201999.32%102.3
Evolution : 2 % entre 2009 et 2019 soit 0.21 % de gain par an.