Frequencies for first 10,000 rows of drg2ing5 variable in nhamcsopd1999 dataset :

 ingredient |
code #5 for |
 medication |
         #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,981       99.81       99.81
      53825 |          1        0.01       99.82
      54400 |          1        0.01       99.83
      54895 |          2        0.02       99.85
      55348 |          2        0.02       99.87
      55755 |          1        0.01       99.88
      55815 |          1        0.01       99.89
      56185 |         11        0.11      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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