75If the SRB had to take into account the evolution of the legal and financial situation of credit institutions during the contribution period concerned, it would be difficult for it to calculate reliably and stably the contributions due by each of them and to pursue the objective of reaching, at the end of the initial period, at least 1% of the amount of deposits covered by all institutions authorised in the territory of a Member State, since the recalculation of the contributions of a given institution necessarily has repercussions on the amount due by other credit institutions.