Frequencies for first 10,000 rows of drug5cl3 variable in namcs2003 dataset :

ndc code #3 |
        for |
 medication |
         #5 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,949       99.49       99.49
       1374 |          4        0.04       99.53
       1568 |          1        0.01       99.54
       1728 |         41        0.41       99.95
       1944 |          3        0.03       99.98
       1945 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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