Frequencies for first 10,000 rows of age_cod variable in demo2004q3 dataset :

       Unit |
abbreviatio |
      n for |
  patient's |
        age |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      2,247       22.47       22.47
        DEC |          8        0.08       22.55
         DY |         30        0.30       22.85
         HR |          1        0.01       22.86
        MON |         78        0.78       23.64
         WK |          4        0.04       23.68
         YR |      7,632       76.32      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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