YearPToutPBase 100
200897.5%100
200992.43%100.5
201097.16%101
201192.46%101.5
201293.19%102
201393.73%102.5
201491.54%103
201591.44%103.4
201699.05%103.9
2017100%104.4
201898.15%104.9
201999.43%105.4
202098.89%105.9
202199.6%106.4
Evolution : 6 % entre 2008 et 2021 soit 0.44 % de gain par an.