Frequencies for first 10,000 rows of generic_drug_effec variable in nadac20160330 dataset :

Correspondi |
 ng Generic |
       Drug |
  Effective |
       Date |      Freq.     Percent        Cum.
------------+-----------------------------------
  22apr2015 |          3        0.03        0.03
  20may2015 |          2        0.02        0.05
  17jun2015 |          3        0.03        0.08
  22jul2015 |          3        0.03        0.11
  19aug2015 |          3        0.03        0.14
  23sep2015 |          5        0.05        0.19
  21oct2015 |          1        0.01        0.20
  18nov2015 |          2        0.02        0.22
  23dec2015 |          5        0.05        0.27
  20jan2016 |          2        0.02        0.29
  17feb2016 |         22        0.22        0.51
  23mar2016 |        826        8.26        8.77
  30mar2016 |          2        0.02        8.79
          . |      9,121       91.21      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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