Frequencies for first 10,000 rows of drg3ing5 variable in nhamcsed2005 dataset :

                             ing. #5 |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
                          sodium ion |          4        0.04        0.04
                              thymol |          1        0.01        0.05
                           vitamin a |          6        0.06        0.11
                           vitamin e |          1        0.01        0.12
                  potassium chloride |          1        0.01        0.13
                                   . |      9,987       99.87      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

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