Frequencies for a_age7 variable in per_aux dataset :

AGE Group 7 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |         31        2.37        2.37
          2 |         27        2.06        4.43
          3 |         54        4.13        8.56
          4 |        178       13.60       22.15
          5 |        163       12.45       34.61
          6 |        271       20.70       55.31
          7 |        163       12.45       67.76
          8 |        139       10.62       78.38
          9 |         94        7.18       85.56
         10 |         66        5.04       90.60
         11 |         36        2.75       93.35
         12 |         87        6.65      100.00
------------+-----------------------------------
      Total |      1,309      100.00

by Jean Roth , jroth@nber.org , 18 Apr 2016