Frequencies for first 10,000 rows of generic_drug_effec variable in nadac20170913 dataset :

Correspondi |
 ng Generic |
       Drug |
  Effective |
       Date |      Freq.     Percent        Cum.
------------+-----------------------------------
  21sep2016 |          1        0.01        0.01
  19oct2016 |          1        0.01        0.02
  21dec2016 |          7        0.07        0.09
  18jan2017 |          1        0.01        0.10
  22feb2017 |          6        0.06        0.16
  22mar2017 |          1        0.01        0.17
  19apr2017 |          1        0.01        0.18
  17may2017 |          1        0.01        0.19
  21jun2017 |          6        0.06        0.25
  19jul2017 |         24        0.24        0.49
  23aug2017 |        761        7.61        8.10
  13sep2017 |          1        0.01        8.11
          . |      9,189       91.89      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 10 Feb 2018