Frequencies for first 10,000 rows of dur_cod variable in ther2011q3 dataset :

       Unit |
abbreviatio |
      n for |
duration of |
    therapy |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      7,177       71.77       71.77
        DAY |      2,330       23.30       95.07
         HR |         30        0.30       95.37
        MIN |         76        0.76       96.13
        MON |         48        0.48       96.61
         WK |        273        2.73       99.34
         YR |         66        0.66      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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