Frequencies for first 10,000 rows of age_cod variable in demo2009q3 dataset :

         Unit |
 abbreviation |
for patient's |
          age |      Freq.     Percent        Cum.
--------------+-----------------------------------
              |      4,775       47.75       47.75
          DEC |         16        0.16       47.91
           DY |        112        1.12       49.03
           HR |          3        0.03       49.06
          MON |         73        0.73       49.79
           WK |          6        0.06       49.85
           YR |      5,015       50.15      100.00
--------------+-----------------------------------
        Total |     10,000      100.00

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