Frequencies for first 10,000 rows of drg3ing4 variable in nhamcsed2003 dataset :

  ingredient code #4 for medication |
                                 #3 |      Freq.     Percent        Cum.
------------------------------------+-----------------------------------
                      potassium ion |          1        0.01        0.01
                         riboflavin |          1        0.01        0.02
                         sodium ion |          1        0.01        0.03
                           thiamine |          6        0.06        0.09
          dextroamphetamine sulfate |          1        0.01        0.10
                hyoscyamine sulfate |          8        0.08        0.18
               dextromethorphan hbr |          1        0.01        0.19
                   neomycin sulfate |          3        0.03        0.22
                      lidocaine hcl |          1        0.01        0.23
                                  . |      9,977       99.77      100.00
------------------------------------+-----------------------------------
                              Total |     10,000      100.00

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