Frequencies for first 10,000 rows of drug2cl3 variable in namcs2005 dataset :

ndc code #3 |
        for |
 medication |
         #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,830       98.30       98.30
       0512 |          1        0.01       98.31
       0514 |         16        0.16       98.47
       1275 |          2        0.02       98.49
       1374 |         10        0.10       98.59
       1568 |          2        0.02       98.61
       1670 |          5        0.05       98.66
       1728 |        103        1.03       99.69
       1944 |         26        0.26       99.95
       1945 |          4        0.04       99.99
       2096 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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