YearPToutPBase 100
200891.81%100
200991.35%100.7
201093.22%101.3
201193.18%102
201293.01%102.7
201393.34%103.3
201495.17%104
201596.42%104.7
201697.51%105.3
2017100%106
201897.14%106.7
201997.75%107.3
202098.72%108
202197.93%108.7
Evolution : 8 % entre 2008 et 2021 soit 0.60 % de gain par an.