Frequencies for first 10,000 rows of drg3ing4 variable in namcs1998 dataset :

 ingredient |
code #4 for |
 medication |
         #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,977       99.77       99.77
      51340 |          2        0.02       99.79
      54455 |          2        0.02       99.81
      54468 |          1        0.01       99.82
      54995 |          2        0.02       99.84
      55105 |          1        0.01       99.85
      55180 |          1        0.01       99.86
      55435 |          2        0.02       99.88
      55745 |          1        0.01       99.89
      55755 |          5        0.05       99.94
      55770 |          1        0.01       99.95
      56194 |          3        0.03       99.98
      56265 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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