Frequencies for first 10,000 rows of drg3ing3 variable in nhamcsopd2004 dataset :

  ingredient code #3 for medication |
                                 #3 |      Freq.     Percent        Cum.
------------------------------------+-----------------------------------
                           caffeine |          3        0.03        0.03
               isometheptene mucate |          1        0.01        0.04
                     methylene blue |          1        0.01        0.05
                   phenyltoloxamine |          1        0.01        0.06
    potassium replacement solutions |          1        0.01        0.07
                          pramoxine |          1        0.01        0.08
                    pseudoephedrine |          2        0.02        0.10
                         riboflavin |         23        0.23        0.33
              rubella virus vaccine |         11        0.11        0.44
                      safflower oil |          1        0.01        0.45
                             starch |          2        0.02        0.47
                     tetanus toxoid |          1        0.01        0.48
                           thiamine |          1        0.01        0.49
                          vitamin c |          1        0.01        0.50
                    carbohydrate(s) |          1        0.01        0.51
                   abacavir sulfate |          1        0.01        0.52
                           protease |          1        0.01        0.53
                            bismuth |          1        0.01        0.54
                       zinc chelate |          1        0.01        0.55
                polymyxin b sulfate |          1        0.01        0.56
           chlorpheniramine maleate |          2        0.02        0.58
       dextroamphetamine saccharate |          2        0.02        0.60
               dextromethorphan hbr |          1        0.01        0.61
                diphenhydramine hcl |          1        0.01        0.62
                   neomycin sulfate |          1        0.01        0.63
                butyl aminobenzoate |          2        0.02        0.65
                    tetanus vaccine |         10        0.10        0.75
                        mineral wax |          1        0.01        0.76
                        vitamin b-6 |          2        0.02        0.78
                    pertussis toxin |          1        0.01        0.79
                                  . |      9,921       99.21      100.00
------------------------------------+-----------------------------------
                              Total |     10,000      100.00

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