Frequencies for first 10,000 rows of age_cod variable in demo2011q2 dataset :

       Unit |
abbreviatio |
      n for |
  patient's |
        age |      Freq.     Percent        Cum.
------------+-----------------------------------
        DEC |         13        0.13        0.13
         DY |         39        0.39        0.52
        MON |         42        0.42        0.94
         WK |          3        0.03        0.97
         YR |      9,903       99.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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