Frequencies for first 10,000 rows of dur_cod variable in ther2011q2 dataset :

       Unit |
abbreviatio |
      n for |
duration of |
    therapy |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,441       74.41       74.41
        DAY |      2,199       21.99       96.40
         HR |         14        0.14       96.54
        MIN |         37        0.37       96.91
        MON |         85        0.85       97.76
         WK |        116        1.16       98.92
         YR |        108        1.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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