Frequencies for first 10,000 rows of dur_cod variable in ther2008q1 dataset :

       Unit |
abbreviatio |
      n for |
duration of |
    therapy |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,802       78.02       78.02
        DAY |      1,544       15.44       93.46
         HR |         20        0.20       93.66
        MIN |        154        1.54       95.20
        MON |        179        1.79       96.99
        SEC |          1        0.01       97.00
         WK |        116        1.16       98.16
         YR |        184        1.84      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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