Frequencies for first 10,000 rows of drg6ing3 variable in nhamcsed2005 dataset :

                             ing. #3 |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
                            caffeine |          2        0.02        0.02
                          pyridoxine |          1        0.01        0.03
                              starch |          1        0.01        0.04
                   vitamin b complex |          1        0.01        0.05
                    atropine sulfate |          1        0.01        0.06
                  pyrilamine tannate |          1        0.01        0.07
                                   . |      9,993       99.93      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

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