May I repeat the answer to the question which I have just read? It is as follows:—
"Particulars of the number of persons in insurable employment are available only in the form of estimates based on the sales of insurance stamps. The total number of stamps sold, and issued to employer depositors in 1955 was 25,806,000, in 1956 it was 25,922,000 and in 1957 it was 24,079,000. The average number of stamps sold per week in a year provides an estimate of the average number of persons in insurable employment each week throughout the year. These weekly averages for the three years in question are respectively 496,300, 498,500 and 463,100. It is not possible to provide similar estimates for periods shorter than a year."