Frequencies for first 10,000 rows of drg4ing4 variable in nhamcsed2005 dataset :

                             ing. #4 |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
                  magnesium antacids |          1        0.01        0.01
                       potassium ion |          2        0.02        0.03
                          pyrilamine |          1        0.01        0.04
                      sodium sulfate |          1        0.01        0.05
                            thiamine |          3        0.03        0.08
                    atropine sulfate |          1        0.01        0.09
              hydrocortisone acetate |          1        0.01        0.10
                 hyoscyamine sulfate |          4        0.04        0.14
                    neomycin sulfate |          1        0.01        0.15
                                   . |      9,985       99.85      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

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