Frequencies for first 10,000 rows of dur_cod variable in ther2013q4 dataset :

       Unit |
abbreviatio |
      n for |
duration of |
    therapy |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,984       99.84       99.84
        DAY |          8        0.08       99.92
        MIN |          5        0.05       99.97
        MON |          1        0.01       99.98
         WK |          1        0.01       99.99
         YR |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 6 Apr 2017