YearPToutPBase 100
201195.44%100
201295.67%100.2
201395.95%100.3
201495.84%100.5
201598.08%100.7
201696.09%100.9
201798.49%101
201897.74%101.2
201996.32%101.4
2020100%101.5
202194.54%101.7
Evolution : 1 % entre 2011 et 2021 soit 0.15 % de gain par an.