Frequencies for first 10,000 rows of val_vbm variable in drug2010q1 dataset :

   Code for |
  source of |
   DRUGNAME |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      6,856       68.56       68.56
          2 |      3,139       31.39       99.95
          . |          5        0.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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