YearPToutPBase 100
2010100%100
201194.8%100.2
201295.22%100.5
201395.79%100.7
201496.99%100.9
201596.79%101.2
201697.88%101.4
201798.72%101.6
201899.76%101.9
201998.04%102.1
202098.29%102.3
Evolution : 2 % entre 2010 et 2020 soit 0.21 % de gain par an.