Frequencies for first 10,000 rows of dur_cod variable in ther2009q4 dataset :

       Unit |
abbreviatio |
      n for |
duration of |
    therapy |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,768       77.68       77.68
        DAY |      1,665       16.65       94.33
         HR |         23        0.23       94.56
        MIN |          8        0.08       94.64
        MON |        212        2.12       96.76
         WK |         65        0.65       97.41
         YR |        259        2.59      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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