Frequencies for first 10,000 rows of dur_cod variable in ther2007q1 dataset :

       Unit |
abbreviatio |
      n for |
duration of |
    therapy |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,492       74.92       74.92
        DAY |      1,526       15.26       90.18
         HR |         49        0.49       90.67
        MIN |        174        1.74       92.41
        MON |        287        2.87       95.28
         WK |        195        1.95       97.23
         YR |        277        2.77      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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