Frequencies for first 10,000 rows of dur variable in ther2012q4 dataset :

   (Mostly) |
    Numeric |
   value of |
        the |
   duration |
(length) of |
    therapy |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |          4        0.04        0.04
          2 |          1        0.01        0.05
          3 |          1        0.01        0.06
          4 |          4        0.04        0.10
          5 |          2        0.02        0.12
          6 |          1        0.01        0.13
         17 |          2        0.02        0.15
         24 |          1        0.01        0.16
         38 |          1        0.01        0.17
         51 |          1        0.01        0.18
        101 |          1        0.01        0.19
          . |      9,981       99.81      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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