Frequencies for first 10,000 rows of drug7cl3 variable in namcs2005 dataset :

ndc code #3 |
        for |
 medication |
         #7 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,959       99.59       99.59
       0514 |          2        0.02       99.61
       1374 |          2        0.02       99.63
       1568 |          1        0.01       99.64
       1670 |          1        0.01       99.65
       1728 |         30        0.30       99.95
       1944 |          5        0.05      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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