Frequencies for first 10,000 rows of drg1ing5 variable in nhamcsed1999 dataset :

 ingredient |
code #5 for |
    drug #1 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,980       99.80       99.80
      53175 |          1        0.01       99.81
      53195 |          1        0.01       99.82
      53647 |          1        0.01       99.83
      55348 |         13        0.13       99.96
      56185 |          3        0.03       99.99
      56193 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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