YearPToutPBase 100
201196.74%100
201299.25%100.1
201393.24%100.3
201497.43%100.4
201596.15%100.5
201699.23%100.6
201798.97%100.8
2018100%100.9
201997.61%101
202098.63%101.1
202195.72%101.3
Evolution : 1 % entre 2011 et 2021 soit 0.12 % de gain par an.