Frequencies for first 10,000 rows of dur_cod variable in ther2005q2 dataset :

       Unit |
abbreviatio |
      n for |
duration of |
    therapy |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      8,367       83.67       83.67
        DAY |      1,080       10.80       94.47
         HR |         22        0.22       94.69
        MIN |        151        1.51       96.20
        MON |        155        1.55       97.75
         WK |         86        0.86       98.61
         YR |        139        1.39      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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