Frequencies for first 10,000 rows of dur_cod variable in ther2010q1 dataset :

       Unit |
abbreviatio |
      n for |
duration of |
    therapy |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,631       76.31       76.31
        DAY |      1,880       18.80       95.11
         HR |         15        0.15       95.26
        MIN |          2        0.02       95.28
        MON |        186        1.86       97.14
        SEC |          1        0.01       97.15
         WK |         93        0.93       98.08
         YR |        192        1.92      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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