Frequencies for first 10,000 rows of drg3ing3 variable in nhamcsopd2003 dataset :

  ingredient code #3 for medication |
                                 #3 |      Freq.     Percent        Cum.
------------------------------------+-----------------------------------
                           caffeine |          1        0.01        0.01
                           dextrose |          1        0.01        0.02
               isometheptene mucate |          1        0.01        0.03
                        pheniramine |          1        0.01        0.04
    potassium replacement solutions |          8        0.08        0.12
                          pramoxine |          1        0.01        0.13
                           procaine |          1        0.01        0.14
                         riboflavin |         12        0.12        0.26
              rubella virus vaccine |          6        0.06        0.32
                             starch |          1        0.01        0.33
                               talc |          1        0.01        0.34
                     tetanus toxoid |          1        0.01        0.35
                  vitamin b complex |          1        0.01        0.36
                    carbohydrate(s) |          2        0.02        0.38
                           protease |          1        0.01        0.39
                polymyxin b sulfate |          1        0.01        0.40
                pseudoephedrine hcl |          1        0.01        0.41
       dextroamphetamine saccharate |          8        0.08        0.49
               dextromethorphan hbr |          1        0.01        0.50
                  phenylephrine hcl |          2        0.02        0.52
                   neomycin sulfate |          4        0.04        0.56
                 pyrilamine tannate |          1        0.01        0.57
            oxycodone terephthalate |          1        0.01        0.58
                    tetanus vaccine |          7        0.07        0.65
                                  . |      9,935       99.35      100.00
------------------------------------+-----------------------------------
                              Total |     10,000      100.00

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