Frequencies for first 10,000 rows of age_cod variable in demo2012q2 dataset :

       Unit |
abbreviatio |
      n for |
  patient's |
        age |      Freq.     Percent        Cum.
------------+-----------------------------------
        DEC |         24        0.24        0.24
         DY |         26        0.26        0.50
        MON |         36        0.36        0.86
         WK |          2        0.02        0.88
         YR |      9,912       99.12      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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