Frequencies for first 10,000 rows of age_cod variable in demo2010q2 dataset :

       Unit |
abbreviatio |
      n for |
  patient's |
        age |      Freq.     Percent        Cum.
------------+-----------------------------------
        DEC |         18        0.18        0.18
         DY |         38        0.38        0.56
         HR |          2        0.02        0.58
        MON |         64        0.64        1.22
         WK |          2        0.02        1.24
         YR |      9,876       98.76      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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