Frequencies for first 10,000 rows of generic_drug_effec variable in nadac20160106 dataset :

Correspondi |
 ng Generic |
       Drug |
  Effective |
       Date |      Freq.     Percent        Cum.
------------+-----------------------------------
  18mar2015 |          4        0.04        0.04
  22apr2015 |          3        0.03        0.07
  20may2015 |          2        0.02        0.09
  17jun2015 |          3        0.03        0.12
  22jul2015 |          4        0.04        0.16
  19aug2015 |          4        0.04        0.20
  23sep2015 |          6        0.06        0.26
  21oct2015 |          6        0.06        0.32
  11nov2015 |          1        0.01        0.33
  18nov2015 |         22        0.22        0.55
  23dec2015 |        851        8.51        9.06
  06jan2016 |          3        0.03        9.09
  30dec2016 |          1        0.01        9.10
          . |      9,090       90.90      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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