Frequencies for first 10,000 rows of drg1ing5 variable in nhamcsed2005 dataset :

                             ing. #5 |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
                          sodium ion |         12        0.12        0.12
                            thiamine |          2        0.02        0.14
                           vitamin a |          9        0.09        0.23
   zinc topical agents, external use |          2        0.02        0.25
                  potassium chloride |          3        0.03        0.28
                     peruvian balsam |          1        0.01        0.29
                 hyoscyamine sulfate |          1        0.01        0.30
                    neomycin sulfate |          3        0.03        0.33
                       cod liver oil |          1        0.01        0.34
                                   . |      9,966       99.66      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

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