Frequencies for first 10,000 rows of drg2ing4 variable in namcs2001 dataset :

 ingredient |
code #4 for |
 medication |
         #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,974       99.74       99.74
      54455 |          1        0.01       99.75
      54713 |          1        0.01       99.76
      55105 |          1        0.01       99.77
      55435 |          1        0.01       99.78
      55490 |          1        0.01       99.79
      55755 |          3        0.03       99.82
      55915 |          1        0.01       99.83
      56020 |          1        0.01       99.84
      70120 |          1        0.01       99.85
      70244 |          1        0.01       99.86
      70247 |          3        0.03       99.89
      70260 |         11        0.11      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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