Frequencies for first 10,000 rows of drg3ing3 variable in nhamcsed2005 dataset :

                             ing. #3 |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
                            caffeine |          3        0.03        0.03
                      eucalyptus oil |          1        0.01        0.04
                  magnesium antacids |          4        0.04        0.08
                          petrolatum |          1        0.01        0.09
                          riboflavin |          6        0.06        0.15
                     sodium chloride |          1        0.01        0.16
                              starch |          2        0.02        0.18
                      tetanus toxoid |          1        0.01        0.19
                          tetracaine |          2        0.02        0.21
                            thiamine |          1        0.01        0.22
                          phosphorus |          1        0.01        0.23
                    atropine sulfate |         10        0.10        0.33
              hydrocodone bitartrate |          1        0.01        0.34
                 pseudoephedrine hcl |          1        0.01        0.35
                dextromethorphan hbr |          5        0.05        0.40
                    neomycin sulfate |          3        0.03        0.43
               carbinoxamine maleate |          1        0.01        0.44
                    ertapenem sodium |          1        0.01        0.45
              carbetapentane tannate |          4        0.04        0.49
                                   . |      9,951       99.51      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

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