Frequencies for first 10,000 rows of dur_cod variable in ther2008q4 dataset :

       Unit |
abbreviatio |
      n for |
duration of |
    therapy |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,939       79.39       79.39
        DAY |      1,509       15.09       94.48
         HR |         28        0.28       94.76
        MIN |         18        0.18       94.94
        MON |        206        2.06       97.00
         WK |        105        1.05       98.05
         YR |        195        1.95      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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