Frequencies for first 10,000 rows of drg2ing4 variable in namcs2000 dataset :

 ingredient |
code #4 for |
 medication |
         #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,973       99.73       99.73
      51340 |          1        0.01       99.74
      53325 |          1        0.01       99.75
      54238 |          1        0.01       99.76
      54455 |          3        0.03       99.79
      54468 |          2        0.02       99.81
      54713 |          1        0.01       99.82
      54960 |          1        0.01       99.83
      54995 |         11        0.11       99.94
      55105 |          2        0.02       99.96
      55180 |          2        0.02       99.98
      55440 |          1        0.01       99.99
      56195 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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