Frequencies for first 10,000 rows of generic_drug_effectime variable in nadac20

 Corresponding Generic |
   Drug Effective Date |
              and Time |      Freq.     Percent        Cum.
-----------------------+-----------------------------------
                       |      9,181       91.81       91.81
01/18/2017 12:00:00 AM |          1        0.01       91.82
02/22/2017 12:00:00 AM |          5        0.05       91.87
05/17/2017 12:00:00 AM |          2        0.02       91.89
06/21/2017 12:00:00 AM |          2        0.02       91.91
07/19/2017 12:00:00 AM |          1        0.01       91.92
08/23/2017 12:00:00 AM |          5        0.05       91.97
09/20/2017 12:00:00 AM |          1        0.01       91.98
10/11/2017 12:00:00 AM |          1        0.01       91.99
10/18/2017 12:00:00 AM |         14        0.14       92.13
11/22/2017 12:00:00 AM |         20        0.20       92.33
12/20/2017 12:00:00 AM |        761        7.61       99.94
12/21/2016 12:00:00 AM |          6        0.06      100.00
-----------------------+-----------------------------------
                 Total |     10,000      100.00

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