YearPToutPBase 100
201191.44%100
201289.65%100.1
2013100%100.3
201491.34%100.4
201593.65%100.6
201692.27%100.7
201793.16%100.9
201893.09%101
201993.19%101.2
202092.2%101.3
202195.87%101.5
Evolution : 1 % entre 2011 et 2021 soit 0.14 % de gain par an.