Frequencies for first 10,000 rows of drg1ing4 variable in namcs1997 dataset :

 ingredient |
code #4 for |
 medication |
         #1 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,854       98.54       98.54
      51340 |          5        0.05       98.59
      53325 |          1        0.01       98.60
      53640 |          2        0.02       98.62
      54440 |          1        0.01       98.63
      54455 |          1        0.01       98.64
      54465 |          1        0.01       98.65
      54468 |          3        0.03       98.68
      54595 |          1        0.01       98.69
      54713 |          3        0.03       98.72
      54995 |          2        0.02       98.74
      55085 |          1        0.01       98.75
      55180 |          7        0.07       98.82
      55710 |         19        0.19       99.01
      55755 |         92        0.92       99.93
      56193 |          1        0.01       99.94
      56194 |          3        0.03       99.97
      56265 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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