Frequencies for first 10,000 rows of drug7cl2 variable in namcs2004 dataset :

ndc code #2 |
        for |
 medication |
         #7 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,938       99.38       99.38
       0507 |          4        0.04       99.42
       0508 |          1        0.01       99.43
       0512 |          7        0.07       99.50
       0513 |          4        0.04       99.54
       0630 |          1        0.01       99.55
       0875 |          2        0.02       99.57
       0913 |          2        0.02       99.59
       1036 |          1        0.01       99.60
       1373 |          2        0.02       99.62
       1671 |          3        0.03       99.65
       1724 |         25        0.25       99.90
       1727 |          5        0.05       99.95
       1728 |          3        0.03       99.98
       1860 |          1        0.01       99.99
       1943 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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