Frequencies for first 10,000 rows of drg3ing4 variable in namcs1994 dataset :

 ingredient |
code #4 for |
 medication |
         #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,975       99.75       99.75
      51340 |          2        0.02       99.77
      54238 |          3        0.03       99.80
      54305 |          1        0.01       99.81
      54465 |          2        0.02       99.83
      54468 |          2        0.02       99.85
      54595 |          1        0.01       99.86
      54713 |          4        0.04       99.90
      54995 |          1        0.01       99.91
      55180 |          1        0.01       99.92
      55710 |          1        0.01       99.93
      55755 |          1        0.01       99.94
      56185 |          4        0.04       99.98
      56194 |          1        0.01       99.99
      56265 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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