Frequencies for first 10,000 rows of age_cod variable in demo2008q3 dataset :

       Unit |
abbreviatio |
      n for |
  patient's |
        age |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      4,875       48.75       48.75
        DEC |         23        0.23       48.98
         DY |         66        0.66       49.64
        MON |         60        0.60       50.24
         WK |          3        0.03       50.27
         YR |      4,973       49.73      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Dec 2015