§ 51. Mr. Meacherasked the Secretary of State for Social Services for each week since 1st January, 1972, how many households have been in receipt of, respect- 230W tively, exemption from prescription, dental and optical charges and free welfare foods; what percentage each of these figures represents of the totals estimated to be eligible; how many in each of these weeks were in receipt for the first time of each of these benefits; how many in each week entered a second or further period of receipt after a successful reclaim; and how many in each week ceased to be in receipt of each of these benefits.