Frequencies for first 10,000 rows of dur_cod variable in ther2007q2 dataset :

       Unit |
abbreviatio |
      n for |
duration of |
    therapy |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,074       70.74       70.74
        DAY |      2,086       20.86       91.60
         HR |         71        0.71       92.31
        MIN |        191        1.91       94.22
        MON |        223        2.23       96.45
         WK |        147        1.47       97.92
         YR |        208        2.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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