Frequencies for first 10,000 rows of drg4ing3 variable in namcs2001 dataset :

 ingredient |
code #3 for |
 medication |
         #4 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,985       99.85       99.85
      53175 |          1        0.01       99.86
      54328 |          3        0.03       99.89
      55105 |          1        0.01       99.90
      55130 |          1        0.01       99.91
      56195 |          2        0.02       99.93
      59803 |          4        0.04       99.97
      70226 |          1        0.01       99.98
      70248 |          1        0.01       99.99
      70259 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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