Frequencies for first 10,000 rows of drg2ing5 variable in nhamcsopd1994 dataset :

 ingredient |
code #5 for |
 medication |
         #2 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,949       99.49       99.49
      55273 |          1        0.01       99.50
      55315 |          1        0.01       99.51
      55348 |          2        0.02       99.53
      55755 |         26        0.26       99.79
      56185 |          9        0.09       99.88
      56193 |          1        0.01       99.89
      56195 |         11        0.11      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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