Frequencies for first 10,000 rows of age_cod variable in demo2004q4 dataset :

       Unit |
abbreviatio |
      n for |
  patient's |
        age |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      2,644       26.44       26.44
        DEC |          7        0.07       26.51
         DY |         34        0.34       26.85
         HR |          2        0.02       26.87
        MON |         57        0.57       27.44
         WK |          8        0.08       27.52
         YR |      7,248       72.48      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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