Frequencies for first 10,000 rows of agegroup variable in stch1994 dataset :

        Age Group |      Freq.     Percent        Cum.
------------------+-----------------------------------
          <1 year |        528        5.28        5.28
        1-4 years |        528        5.28       10.56
        5-9 years |        528        5.28       15.84
      10-14 years |        526        5.26       21.10
      15-19 years |        526        5.26       26.36
      20-24 years |        526        5.26       31.62
      25-29 years |        526        5.26       36.88
      30-34 years |        526        5.26       42.14
      35-39 years |        526        5.26       47.40
      40-44 years |        526        5.26       52.66
      45-49 years |        526        5.26       57.92
      50-54 years |        526        5.26       63.18
      55-59 years |        526        5.26       68.44
      60-64 years |        526        5.26       73.70
      65-69 years |        526        5.26       78.96
      70-74 years |        526        5.26       84.22
      75-79 years |        526        5.26       89.48
      80-84 years |        526        5.26       94.74
85 years and over |        526        5.26      100.00
------------------+-----------------------------------
            Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 Oct 2016