Frequencies for first 10,000 rows of drg4ing3 variable in namcs2000 dataset :

 ingredient |
code #3 for |
 medication |
         #4 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,977       99.77       99.77
      50745 |          4        0.04       99.81
      53650 |          1        0.01       99.82
      54050 |          1        0.01       99.83
      54465 |          1        0.01       99.84
      54468 |          4        0.04       99.88
      54595 |          1        0.01       99.89
      54990 |          1        0.01       99.90
      54995 |          1        0.01       99.91
      55130 |          3        0.03       99.94
      55240 |          1        0.01       99.95
      56193 |          1        0.01       99.96
      59629 |          1        0.01       99.97
      59803 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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