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

ob/gyn care |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      9,799       97.99       97.99
        yes |        201        2.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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