Frequencies for first 10,000 rows of drg1ing4 variable in namcs1994 dataset :

 ingredient |
code #4 for |
 medication |
         #1 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,936       99.36       99.36
      51340 |          3        0.03       99.39
      53325 |          2        0.02       99.41
      53640 |          1        0.01       99.42
      54238 |          3        0.03       99.45
      54465 |          4        0.04       99.49
      54468 |         12        0.12       99.61
      54595 |         10        0.10       99.71
      54713 |          5        0.05       99.76
      54960 |          1        0.01       99.77
      54995 |          1        0.01       99.78
      55105 |          1        0.01       99.79
      55180 |          6        0.06       99.85
      55315 |          1        0.01       99.86
      55645 |          1        0.01       99.87
      55710 |          8        0.08       99.95
      56185 |          1        0.01       99.96
      56265 |          4        0.04      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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