YearPToutPBase 100
201098.33%100
201197.28%100.1
201297.28%100.3
201395.89%100.4
201497.46%100.6
201597.07%100.7
201697.89%100.9
201797.52%101
2018100%101.2
201997.99%101.3
202098.58%101.5
Evolution : 1 % entre 2010 et 2020 soit 0.14 % de gain par an.