Adjusting storage fees

All the listed fees are subject to an annual price adjustment, which is calculated according to the following formula.

In this formula the following terms mean:

E=Applicable storage fee in €/year or €/month
E0=Initial value for the storage fee
I=Average annual value of the German Producer Price Index
I0=Base value for I; base year 2009 (2005 = 100)
L=Annual average value of the index of hourly rates in the German energy industry
L0=Base value for L; base year 2009 (2005 = 100)