Frequencies for first 10,000 rows of pelvic variable in nhamcsed2011 dataset :

Pelvic exam |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,722       97.22       97.22
        Yes |        278        2.78      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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