Frequencies for first 10,000 rows of drg1ing4 variable in nhamcsopd1993 dataset :

 ingredient |
code #4 for |
 medication |
         #1 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,979       99.79       99.79
      53720 |          1        0.01       99.80
      54455 |          1        0.01       99.81
      54468 |          4        0.04       99.85
      54595 |          1        0.01       99.86
      54713 |          1        0.01       99.87
      55105 |          1        0.01       99.88
      55150 |          1        0.01       99.89
      55270 |          1        0.01       99.90
      55461 |          1        0.01       99.91
      55755 |          1        0.01       99.92
      56120 |          1        0.01       99.93
      56185 |          1        0.01       99.94
      56265 |          5        0.05       99.99
      56285 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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