Frequencies for first 10,000 rows of dur_cod variable in ther2011q4 dataset :

       Unit |
abbreviatio |
      n for |
duration of |
    therapy |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,914       79.14       79.14
        DAY |      1,858       18.58       97.72
         HR |          3        0.03       97.75
        MIN |          6        0.06       97.81
        MON |         78        0.78       98.59
         WK |         22        0.22       98.81
         YR |        119        1.19      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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