any changes to the information referred to in points (a), (b) and (c) for the years between the relevant base year or period and the year X-3, indicating the reasons for those changes;
aon athruithe ar an bhfaisnéis dá dtagraítear i bpointí (a), (b) agus (c) do na blianta idir an bhonnbhliain ábhartha nó an bhonntréimhse ábhartha agus bliain X-3, ag léiriú na gcúiseanna a bhí leis na hathruithe sin;