Frequencies for first 10,000 rows of drg3ing4 variable in namcs1993 dataset :

 ingredient |
code #4 for |
 medication |
         #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,978       99.78       99.78
      50824 |          1        0.01       99.79
      53175 |          1        0.01       99.80
      53640 |          1        0.01       99.81
      54465 |          2        0.02       99.83
      54468 |          3        0.03       99.86
      54595 |          1        0.01       99.87
      54713 |          2        0.02       99.89
      54995 |          2        0.02       99.91
      55180 |          4        0.04       99.95
      55315 |          1        0.01       99.96
      55770 |          1        0.01       99.97
      56194 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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