Frequencies for first 10,000 rows of dur_cod variable in ther2007q3 dataset :

       Unit |
abbreviatio |
      n for |
duration of |
    therapy |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,493       74.93       74.93
        DAY |      1,522       15.22       90.15
         HR |         58        0.58       90.73
        MIN |        432        4.32       95.05
        MON |        195        1.95       97.00
         WK |        193        1.93       98.93
         YR |        107        1.07      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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