Frequencies for first 10,000 rows of drg6ing3 variable in nhamcsopd2003 dataset :

  ingredient code #3 for medication |
                                 #6 |      Freq.     Percent        Cum.
------------------------------------+-----------------------------------
                           caffeine |          1        0.01        0.01
               isometheptene mucate |          1        0.01        0.02
    potassium replacement solutions |          1        0.01        0.03
                          pramoxine |          1        0.01        0.04
                         riboflavin |          4        0.04        0.08
              rubella virus vaccine |          1        0.01        0.09
                         sodium ion |          1        0.01        0.10
                         phosphorus |          1        0.01        0.11
                    carbohydrate(s) |          2        0.02        0.13
            oxycodone terephthalate |          1        0.01        0.14
                                  . |      9,986       99.86      100.00
------------------------------------+-----------------------------------
                              Total |     10,000      100.00

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