Frequencies for first 10,000 rows of drg2ing4 variable in namcs1994 dataset :

 ingredient |
code #4 for |
 medication |
         #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,950       99.50       99.50
      51340 |          2        0.02       99.52
      53640 |          2        0.02       99.54
      54455 |          1        0.01       99.55
      54465 |          4        0.04       99.59
      54468 |          5        0.05       99.64
      54595 |          3        0.03       99.67
      54713 |          2        0.02       99.69
      54860 |          2        0.02       99.71
      54995 |          5        0.05       99.76
      55105 |          2        0.02       99.78
      55180 |          4        0.04       99.82
      55320 |          1        0.01       99.83
      55645 |          1        0.01       99.84
      55710 |          2        0.02       99.86
      55770 |          2        0.02       99.88
      56185 |         10        0.10       99.98
      56193 |          1        0.01       99.99
      56265 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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