Frequencies for first 10,000 rows of dur_cod variable in ther2004q4 dataset :

       Unit |
abbreviatio |
      n for |
duration of |
    therapy |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,536       75.36       75.36
        DAY |      1,575       15.75       91.11
         HR |         11        0.11       91.22
        MIN |        263        2.63       93.85
        MON |        216        2.16       96.01
         WK |        145        1.45       97.46
         YR |        254        2.54      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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