Frequencies for first 10,000 rows of dur_cod variable in ther2007q4 dataset :

       Unit |
abbreviatio |
      n for |
duration of |
    therapy |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,579       75.79       75.79
        DAY |      1,516       15.16       90.95
         HR |         43        0.43       91.38
        MIN |        375        3.75       95.13
        MON |        222        2.22       97.35
         WK |        112        1.12       98.47
         YR |        153        1.53      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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