Therefore, daily supply is adjusted with the factor LSSPR to account for the loss of the largest supplier, route, or plant. If extreme events are taken into account, total storage capacity should be corrected for the storage capacity of the largest supplier if this is storage. This availability can be corrected further for the energy dependency of gas in order to show the relative importance of gas as primary fuel. The energy dependency is based on the complement of the share in primary energy, instead of the share itself, because of the positive formulation of the indicator (short-run availability increases when a country is not fully dependent on gas). Therefore, in order to calculate the short-run availability of oil the required critical stocks of oil that would need to be kept to cover a benchmark period of time are considered. The benchmark period could be based on the length of the period IEA members are required to maintain stock: 90 days of average consumption.