Frequencies for first 10,000 rows of pelvic variable in namcs1997 dataset :

pelvic exam |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      9,444       94.44       94.44
          1 |        556        5.56      100.00
------------+-----------------------------------
      Total |     10,000      100.00

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