Frequencies for first 10,000 rows of dur variable in ther2015q1 dataset :

   (Mostly) |
    Numeric |
   value of |
        the |
   duration |
(length) of |
    therapy |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |          1        0.01        0.01
         10 |          1        0.01        0.02
         12 |          1        0.01        0.03
          . |      9,997       99.97      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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