Frequencies for first 10,000 rows of drg1ing4 variable in nhamcsed1993 dataset :

 ingredient |
code #4 for |
    drug #1 |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,943       99.43       99.43
      52465 |          1        0.01       99.44
      54238 |          1        0.01       99.45
      54468 |          6        0.06       99.51
      54595 |          4        0.04       99.55
      54713 |         13        0.13       99.68
      55150 |          1        0.01       99.69
      55180 |         29        0.29       99.98
      56265 |          1        0.01       99.99
      56288 |          1        0.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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