Frequencies for first 10,000 rows of pelvic variable in nhamcsopd2007 dataset :

pelvic exam |      Freq.     Percent        Cum.
------------+-----------------------------------
         no |      9,006       90.06       90.06
        yes |        994        9.94      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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