Frequencies for first 10,000 rows of drg1ing5 variable in namcs2000 dataset :

 ingredient |
code #5 for |
 medication |
         #1 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,971       99.71       99.71
      53195 |          1        0.01       99.72
      54895 |          1        0.01       99.73
      55180 |          1        0.01       99.74
      55348 |          4        0.04       99.78
      55755 |          2        0.02       99.80
      55815 |          1        0.01       99.81
      56185 |         16        0.16       99.97
      56193 |          2        0.02       99.99
      70042 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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