Frequencies for first 10,000 rows of val_vbm variable in drug2011q3 dataset :

   Code for |
  source of |
   DRUGNAME |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      8,354       83.54       83.54
          2 |      1,632       16.32       99.86
   2.01e+07 |          1        0.01       99.87
          . |         13        0.13      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 18 Dec 2015