Frequencies for first 10,000 rows of val_vbm variable in drug2012q2 dataset :

   Code for |
  source of |
   DRUGNAME |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      8,279       82.79       82.79
          2 |      1,699       16.99       99.78
   2.01e+07 |          1        0.01       99.79
   2.01e+07 |          1        0.01       99.80
          . |         20        0.20      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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