Frequencies for first 10,000 rows of drg4ing3 variable in namcs2004 dataset :

 ingredient |
code #3 for |
 medication |
         #4 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,977       99.77       99.77
      55105 |          4        0.04       99.81
      55130 |          2        0.02       99.83
      55360 |          1        0.01       99.84
      56193 |          3        0.03       99.87
      56340 |          3        0.03       99.90
      56345 |          1        0.01       99.91
      70259 |          3        0.03       99.94
      70358 |          1        0.01       99.95
      70362 |          1        0.01       99.96
      70438 |          1        0.01       99.97
      70626 |          1        0.01       99.98
      70667 |          1        0.01       99.99
      70690 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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