Frequencies for first 10,000 rows of generic_drug_effec variable in nadac20170802 dataset :

Correspondi |
 ng Generic |
       Drug |
  Effective |
       Date |      Freq.     Percent        Cum.
------------+-----------------------------------
  20jul2016 |          1        0.01        0.01
  21sep2016 |          1        0.01        0.02
  19oct2016 |          1        0.01        0.03
  23nov2016 |          1        0.01        0.04
  21dec2016 |          7        0.07        0.11
  18jan2017 |          1        0.01        0.12
  22feb2017 |          6        0.06        0.18
  22mar2017 |          8        0.08        0.26
  19apr2017 |          2        0.02        0.28
  17may2017 |          4        0.04        0.32
  21jun2017 |         17        0.17        0.49
  19jul2017 |        762        7.62        8.11
  26jul2017 |          2        0.02        8.13
  02aug2017 |          2        0.02        8.15
          . |      9,185       91.85      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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