Frequencies for first 10,000 rows of drg1ing5 variable in namcs2005 dataset :

 ingredient |
code #5 for |
 medication |
         #1 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,928       99.28       99.28
      53640 |          1        0.01       99.29
      55348 |          4        0.04       99.33
      55610 |          1        0.01       99.34
      55755 |          2        0.02       99.36
      55770 |          1        0.01       99.37
      56185 |         16        0.16       99.53
      56193 |          1        0.01       99.54
      56195 |          2        0.02       99.56
      56265 |          1        0.01       99.57
      70120 |          1        0.01       99.58
      70275 |          1        0.01       99.59
      70358 |          1        0.01       99.60
      70362 |          5        0.05       99.65
      70388 |          1        0.01       99.66
      70396 |          1        0.01       99.67
      70435 |          1        0.01       99.68
      70643 |          2        0.02       99.70
      70709 |         30        0.30      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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