Frequencies for first 10,000 rows of drg6ing5 variable in nhamcsed2005 dataset :

                             ing. #5 |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
                           vitamin c |          1        0.01        0.01
                                   . |      9,999       99.99      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

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