Frequencies for first 10,000 rows of val_vbm variable in drug2011q4 dataset :

   Code for |
  source of |
   DRUGNAME |      Freq.     Percent        Cum.
------------+-----------------------------------
          1 |      8,302       83.02       83.02
          2 |      1,684       16.84       99.86
          . |         14        0.14      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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