Frequencies for first 10,000 rows of drg2ing4 variable in nhamcsopd2002 dataset :

 ingredient |
code #4 for |
 medication |
         #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,959       99.59       99.59
      52023 |          1        0.01       99.60
      53175 |          1        0.01       99.61
      54713 |          3        0.03       99.64
      55105 |          1        0.01       99.65
      55218 |          1        0.01       99.66
      55755 |         15        0.15       99.81
      70032 |          1        0.01       99.82
      70231 |          1        0.01       99.83
      70260 |          7        0.07       99.90
      70331 |          1        0.01       99.91
      70336 |          2        0.02       99.93
      70358 |          2        0.02       99.95
      70440 |          1        0.01       99.96
      70457 |          1        0.01       99.97
      70668 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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