Frequencies for first 10,000 rows of drg5ing4 variable in nhamcsed2004 dataset :

  ingredient code #4 for medication |
                                 #5 |      Freq.     Percent        Cum.
------------------------------------+-----------------------------------
                         phenacetin |          1        0.01        0.01
                         riboflavin |          1        0.01        0.02
                           thiamine |          3        0.03        0.05
                          vitamin c |          1        0.01        0.06
  zinc topical agents, external use |          1        0.01        0.07
                   atropine sulfate |          1        0.01        0.08
                hyoscyamine sulfate |          3        0.03        0.11
                       zinc acetate |          1        0.01        0.12
                                  . |      9,988       99.88      100.00
------------------------------------+-----------------------------------
                              Total |     10,000      100.00

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