YearPToutPBase 100
201192.37%100
201291.88%100.9
201394.98%101.7
201492.87%102.6
201592.3%103.4
201697.87%104.3
201798.75%105.2
201897.28%106
201997.39%106.9
202098.44%107.7
2021100%108.6
Evolution : 8 % entre 2011 et 2021 soit 0.75 % de gain par an.