Frequencies for first 10,000 rows of drg4ing3 variable in namcs1999 dataset :

 ingredient |
code #3 for |
 medication |
         #4 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,983       99.83       99.83
      50745 |          3        0.03       99.86
      54050 |          1        0.01       99.87
      54455 |          1        0.01       99.88
      54465 |          1        0.01       99.89
      55130 |          2        0.02       99.91
      55140 |          1        0.01       99.92
      59803 |          8        0.08      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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