Frequencies for first 10,000 rows of drg8ing2 variable in nhamcsed2003 dataset :

  ingredient code #2 for medication |
                                 #8 |      Freq.     Percent        Cum.
------------------------------------+-----------------------------------
                     ergocalciferol |          1        0.01        0.01
                        guaifenesin |          1        0.01        0.02
                           levodopa |          1        0.01        0.03
                         pyridoxine |          1        0.01        0.04
                       trimethoprim |          1        0.01        0.05
                          vitamin e |          1        0.01        0.06
                      water sterile |          1        0.01        0.07
                         salmeterol |          1        0.01        0.08
                        glucosamine |          1        0.01        0.09
                magnesium hydroxide |          1        0.01        0.10
                   atropine sulfate |          1        0.01        0.11
             hydrocodone bitartrate |          5        0.05        0.16
                  codeine phosphate |          1        0.01        0.17
                  ampicillin sodium |          1        0.01        0.18
                      oxycodone hcl |          3        0.03        0.21
                   neomycin sulfate |          2        0.02        0.23
                   promethazine hcl |          1        0.01        0.24
                         lisinopril |          1        0.01        0.25
                                  . |      9,975       99.75      100.00
------------------------------------+-----------------------------------
                              Total |     10,000      100.00

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