Frequencies for first 10,000 rows of a_age4 variable in per_aux dataset :

AGE Group 4 |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      1,080       10.80       10.80
          2 |      1,739       17.39       28.19
          3 |      1,365       13.65       41.84
          4 |      2,103       21.03       62.87
          5 |      1,136       11.36       74.23
          6 |      1,312       13.12       87.35
          7 |        790        7.90       95.25
          8 |        475        4.75      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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