Frequencies for first 10,000 rows of drg4ing3 variable in namcs1996 dataset :

 ingredient |
code #3 for |
 medication |
         #4 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,960       99.60       99.60
      50668 |          1        0.01       99.61
      50745 |          5        0.05       99.66
      52045 |          1        0.01       99.67
      52908 |          2        0.02       99.69
      53175 |          3        0.03       99.72
      54025 |          1        0.01       99.73
      54325 |          1        0.01       99.74
      54395 |          2        0.02       99.76
      54465 |          4        0.04       99.80
      54595 |          3        0.03       99.83
      54755 |          1        0.01       99.84
      55105 |          3        0.03       99.87
      55130 |          3        0.03       99.90
      55240 |          3        0.03       99.93
      55623 |          1        0.01       99.94
      55745 |          4        0.04       99.98
      56193 |          1        0.01       99.99
      57028 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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