Frequencies for first 10,000 rows of age_cod variable in demo2009q1 dataset :

       Unit |
abbreviatio |
      n for |
  patient's |
        age |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      4,993       49.93       49.93
        DEC |         14        0.14       50.07
         DY |         51        0.51       50.58
         HR |          1        0.01       50.59
        MON |         55        0.55       51.14
         WK |          4        0.04       51.18
         YR |      4,882       48.82      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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