Frequencies for first 10,000 rows of age_cod variable in demo2009q2 dataset :

       Unit |
abbreviatio |
      n for |
  patient's |
        age |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      5,334       53.34       53.34
        DEC |         13        0.13       53.47
         DY |        116        1.16       54.63
        MON |         67        0.67       55.30
         WK |          4        0.04       55.34
         YR |      4,466       44.66      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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