Frequencies for first 10,000 rows of dur_cod variable in ther2013q1 dataset :

       Unit |
abbreviatio |
      n for |
duration of |
    therapy |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,922       99.22       99.22
        CYC |         17        0.17       99.39
        DAY |         48        0.48       99.87
         HR |          2        0.02       99.89
        MON |          3        0.03       99.92
         WK |          3        0.03       99.95
         YR |          5        0.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 7 Apr 2017