Frequencies for first 10,000 rows of drug1cl3 variable in namcs2004 dataset :

ndc code #3 |
        for |
 medication |
         #1 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,830       98.30       98.30
       0514 |         18        0.18       98.48
       0877 |          4        0.04       98.52
       1268 |          1        0.01       98.53
       1275 |          1        0.01       98.54
       1374 |         17        0.17       98.71
       1567 |          2        0.02       98.73
       1568 |         13        0.13       98.86
       1670 |          4        0.04       98.90
       1727 |          5        0.05       98.95
       1728 |         71        0.71       99.66
       1864 |          1        0.01       99.67
       1940 |          1        0.01       99.68
       1943 |          1        0.01       99.69
       1944 |         18        0.18       99.87
       1945 |          9        0.09       99.96
       2095 |          1        0.01       99.97
       2096 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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