Frequencies for first 10,000 rows of dur variable in ther2014q4 dataset :

   (Mostly) |
    Numeric |
   value of |
        the |
   duration |
(length) of |
    therapy |      Freq.     Percent        Cum.
------------+-----------------------------------
          3 |          1        0.01        0.01
          8 |          1        0.01        0.02
         14 |          1        0.01        0.03
         15 |          1        0.01        0.04
          . |      9,996       99.96      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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