Frequencies for first 10,000 rows of drg3ing5 variable in nhamcsed1995 dataset :

 ingredient |
code #5 for |
    drug #3 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,993       99.93       99.93
      55348 |          2        0.02       99.95
      56185 |          2        0.02       99.97
      56192 |          1        0.01       99.98
      56193 |          2        0.02      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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