Frequencies for first 10,000 rows of drug6cl3 variable in namcs2002 dataset :

NDC code #3 |
        for |
 medication |
         #6 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,968       99.68       99.68
       1567 |          1        0.01       99.69
       1728 |         30        0.30       99.99
       1864 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016