Frequencies for first 10,000 rows of pelvic variable in nhamcsopd2011 dataset :

Pelvic exam |      Freq.     Percent        Cum.
------------+-----------------------------------
         No |      9,002       90.02       90.02
        Yes |        998        9.98      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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