Frequencies for first 10,000 rows of age_cod variable in demo2005q4 dataset :

       Unit |
abbreviatio |
      n for |
  patient's |
        age |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      4,808       48.08       48.08
        DEC |          8        0.08       48.16
         DY |         73        0.73       48.89
         HR |          2        0.02       48.91
        MON |         40        0.40       49.31
         YR |      5,069       50.69      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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