assumption is right we can also get from the following table.
             It makes evident the imense rise of income of youths during the period from 1948 to 1968.
             Table 1: Average weekly earnings of young manual workers(5)
             Year boys (under 21 years) | Girls (under 18 years) (₤) (s) (p) (₤) (s) (p)
             1948 2 18 0 | 2 8 111950 3 2 6 | 2 12 81952 3 13 4 | 2 19 41954 4 3 10 | 3 7 81956 5 1 5 | 3 19 101958 5 10 10 | 4 6 21960 6 6 7 | 4 15 01962 7 1 6 | 5 4 41964 8 1 6 | 5 18 11966 9 12 4 | 6 15 51968 10 14 11
             ...