Frequencies for first 10,000 rows of drg2ing4 variable in nhamcsopd1996 dataset :

 ingredient |
code #4 for |
 medication |
         #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,929       99.29       99.29
      52465 |          1        0.01       99.30
      54465 |          1        0.01       99.31
      54468 |          1        0.01       99.32
      54713 |          7        0.07       99.39
      54895 |          1        0.01       99.40
      55105 |         10        0.10       99.50
      55218 |          1        0.01       99.51
      55315 |          1        0.01       99.52
      55645 |          1        0.01       99.53
      55710 |         11        0.11       99.64
      55755 |         29        0.29       99.93
      55770 |          3        0.03       99.96
      56193 |          1        0.01       99.97
      56265 |          3        0.03      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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