Frequencies for first 10,000 rows of drug4cl3 variable in namcs2002 dataset :

NDC code #3 |
        for |
 medication |
         #4 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,929       99.29       99.29
       0514 |          3        0.03       99.32
       1374 |          7        0.07       99.39
       1568 |          2        0.02       99.41
       1728 |         56        0.56       99.97
       1864 |          1        0.01       99.98
       1944 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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