This demand flexibility is useful as resilience measure if supply were disrupted at peak demand. The rate of contractually flexible demand (interruptible contracts) again provides useful information on a major aspect regarding the resilience of a certain national/regional energy system. This indicator is transparent when final energy demand is considered. The total amount of interruptible contracts in a country, however, cannot be obtained from international statistics. A high level of demand response is favourable for the business case of a baseload technology such as notably nuclear.