Frequencies for first 10,000 rows of age_cod variable in demo2010q4 dataset :

       Unit |
abbreviatio |
      n for |
  patient's |
        age |      Freq.     Percent        Cum.
------------+-----------------------------------
            |          2        0.02        0.02
        DEC |         13        0.13        0.15
         DY |         33        0.33        0.48
        MON |         33        0.33        0.81
         WK |          3        0.03        0.84
         YR |      9,916       99.16      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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