Frequencies for first 10,000 rows of drug6cl3 variable in namcs2004 dataset :

ndc code #3 |
        for |
 medication |
         #6 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,958       99.58       99.58
       0510 |          1        0.01       99.59
       0514 |          1        0.01       99.60
       1374 |          1        0.01       99.61
       1728 |         35        0.35       99.96
       1944 |          2        0.02       99.98
       2096 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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