Frequencies for first 10,000 rows of dur_cod variable in ther2008q2 dataset :

       Unit |
abbreviatio |
      n for |
duration of |
    therapy |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,877       78.77       78.77
        DAY |      1,585       15.85       94.62
         HR |         16        0.16       94.78
        MIN |        130        1.30       96.08
        MON |        129        1.29       97.37
         WK |        102        1.02       98.39
         YR |        161        1.61      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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