Frequencies for first 10,000 rows of drg5ing3 variable in nhamcsed2005 dataset :

                             ing. #3 |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
                             codeine |          1        0.01        0.01
                  magnesium antacids |          1        0.01        0.02
                          riboflavin |          1        0.01        0.03
                            thiamine |          1        0.01        0.04
                    atropine sulfate |          1        0.01        0.05
                   gymnema sylvestre |          1        0.01        0.06
                                   . |      9,994       99.94      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

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