Frequencies for first 10,000 rows of age_cod variable in demo2008q2 dataset :

       Unit |
abbreviatio |
      n for |
  patient's |
        age |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      4,388       43.88       43.88
        DEC |         20        0.20       44.08
         DY |         52        0.52       44.60
        MON |         47        0.47       45.07
         WK |          2        0.02       45.09
         YR |      5,491       54.91      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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