YearPToutPBase 100
201195.26%100
201297.27%100.2
201397.01%100.3
201494.71%100.5
201583.72%100.7
201699.58%100.8
201798.48%101
2018100%101.1
201999.15%101.3
202090.67%101.5
202197.62%101.6
Evolution : 1 % entre 2011 et 2021 soit 0.14 % de gain par an.