Frequencies for first 10,000 rows of drg2ing4 variable in namcs1995 dataset :

 ingredient |
code #4 for |
 medication |
         #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,953       99.53       99.53
      51340 |          1        0.01       99.54
      53325 |          1        0.01       99.55
      54238 |          1        0.01       99.56
      54455 |          3        0.03       99.59
      54468 |         10        0.10       99.69
      54595 |          2        0.02       99.71
      54710 |          3        0.03       99.74
      54713 |          1        0.01       99.75
      54995 |          3        0.03       99.78
      55105 |          4        0.04       99.82
      55180 |          3        0.03       99.85
      55440 |          1        0.01       99.86
      55710 |          3        0.03       99.89
      55745 |          1        0.01       99.90
      55755 |          5        0.05       99.95
      55770 |          1        0.01       99.96
      56185 |          1        0.01       99.97
      56193 |          1        0.01       99.98
      56194 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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