Frequencies for first 10,000 rows of dur variable in ther2014q2 dataset :

   (Mostly) |
    Numeric |
   value of |
        the |
   duration |
(length) of |
    therapy |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |          2        0.02        0.02
          2 |          2        0.02        0.04
          3 |          4        0.04        0.08
          4 |          2        0.02        0.10
        122 |          1        0.01        0.11
          . |      9,989       99.89      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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