(53)On a biennial basis, and for the first time within four years from the entry into force of this Directive, Member States should obtain reliable annual statistics on the functioning of the measures introduced by this Directive. They should use any relevant sources of information and communicate that information to the Commission. The Commission should provide a report on the basis of the information received from the Member States for the first time after four years from the entry into force of this Directive and thereafter biennially.