Frequencies for first 10,000 rows of drg2ing4 variable in namcs1993 dataset :

 ingredient |
code #4 for |
 medication |
         #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,943       99.43       99.43
      51340 |          1        0.01       99.44
      53620 |          1        0.01       99.45
      53640 |          4        0.04       99.49
      54465 |          4        0.04       99.53
      54468 |         13        0.13       99.66
      54595 |          6        0.06       99.72
      54713 |          1        0.01       99.73
      54995 |          5        0.05       99.78
      55105 |          3        0.03       99.81
      55150 |          3        0.03       99.84
      55180 |          8        0.08       99.92
      56185 |          1        0.01       99.93
      56193 |          1        0.01       99.94
      56194 |          4        0.04       99.98
      56265 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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