Frequencies for first 10,000 rows of age_cod variable in demo2011q4 dataset :

       Unit |
abbreviatio |
      n for |
  patient's |
        age |      Freq.     Percent        Cum.
------------+-----------------------------------
        DEC |         21        0.21        0.21
         DY |         17        0.17        0.38
        MON |         21        0.21        0.59
         YR |      9,941       99.41      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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